15255640 has 32 divisors (see below), whose sum is σ = 34650000. Its totient is φ = 6044544.

The previous prime is 15255629. The next prime is 15255661. The reversal of 15255640 is 4655251.

It is a junction number, because it is equal to n+sod(n) for n = 15255599 and 15255608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2611 + ... + 6109.

Almost surely, 2^15255640 is an apocalyptic number.

15255640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15255640 is an abundant number, since it is smaller than the sum of its proper divisors (19394360).

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

15255640 is a wasteful number, since it uses less digits than its factorization.

15255640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619 (or 3615 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 15255640 is about 3905.8468992012. The cubic root of 15255640 is about 248.0143505397.

The spelling of 15255640 in words is "fifteen million, two hundred fifty-five thousand, six hundred forty".