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311040 = 28355
BaseRepresentation
bin1001011111100000000
3120210200000
41023330000
534423130
610400000
72433552
oct1137400
9523600
10311040
111a2764
12130000
13ab762
14814d2
1562260
hex4bf00

311040 has 108 divisors (see below), whose sum is σ = 1116024. Its totient is φ = 82944.

The previous prime is 311033. The next prime is 311041. The reversal of 311040 is 40113.

It is a Jordan-Polya number, since it can be written as 6! ⋅ (3!)3 ⋅ 2!.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 311040.

It is not an unprimeable number, because it can be changed into a prime (311041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62206 + ... + 62210.

2311040 is an apocalyptic number.

311040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (558012).

311040 is an abundant number, since it is smaller than the sum of its proper divisors (804984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311040 is an frugal number, since it uses more digits than its factorization.

311040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 311040 is about 557.7096018539. The cubic root of 311040 is about 67.7545940794.

Adding to 311040 its reverse (40113), we get a palindrome (351153).

The spelling of 311040 in words is "three hundred eleven thousand, forty", and thus it is an iban number.