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2221240 = 23577933
BaseRepresentation
bin1000011110010010111000
311011211222011
420132102320
51032034430
6115335304
724610630
oct10362270
94154864
102221240
11128793a
128b1534
135ca058
1441b6c0
152dd22a
hex21e4b8

2221240 has 32 divisors (see below), whose sum is σ = 5712480. Its totient is φ = 761472.

The previous prime is 2221231. The next prime is 2221249. The reversal of 2221240 is 421222.

It is an interprime number because it is at equal distance from previous prime (2221231) and next prime (2221249).

It is a self number, because there is not a number n which added to its sum of digits gives 2221240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221249) 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, 3687 + ... + 4246.

It is an arithmetic number, because the mean of its divisors is an integer number (178515).

22221240 is an apocalyptic number.

2221240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221240 is an abundant number, since it is smaller than the sum of its proper divisors (3491240).

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

2221240 is a wasteful number, since it uses less digits than its factorization.

2221240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7951 (or 7947 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2221240 is about 1490.3825012392. The cubic root of 2221240 is about 130.4763588556.

Adding to 2221240 its reverse (421222), we get a palindrome (2642462).

The spelling of 2221240 in words is "two million, two hundred twenty-one thousand, two hundred forty".

Divisors: 1 2 4 5 7 8 10 14 20 28 35 40 56 70 140 280 7933 15866 31732 39665 55531 63464 79330 111062 158660 222124 277655 317320 444248 555310 1110620 2221240