1100640 has 48 divisors (see below), whose sum is σ = 3468528. Its totient is φ = 293376.

The previous prime is 1100611. The next prime is 1100641. The reversal of 1100640 is 460011.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1100640² = 2422816819200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 667 + ... + 1626.

It is an arithmetic number, because the mean of its divisors is an integer number (72261).

2^1100640 is an apocalyptic number.

1100640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100640 is an abundant number, since it is smaller than the sum of its proper divisors (2367888).

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

1100640 is a wasteful number, since it uses less digits than its factorization.

1100640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1100640 is about 1049.1139118323. The cubic root of 1100640 is about 103.2480276422.

Adding to 1100640 its reverse (460011), we get a palindrome (1560651).

The spelling of 1100640 in words is "one million, one hundred thousand, six hundred forty".