55939040 has 48 divisors (see below), whose sum is σ = 139119120. Its totient is φ = 21196800.

The previous prime is 55939019. The next prime is 55939049. The reversal of 55939040 is 4093955.

It is a super-2 number, since 2×55939040² = 6258352392243200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55939049) 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, 6161 + ... + 12240.

It is an arithmetic number, because the mean of its divisors is an integer number (2898315).

Almost surely, 2^55939040 is an apocalyptic number.

It is an amenable number.

55939040 is an abundant number, since it is smaller than the sum of its proper divisors (83180080).

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

55939040 is a wasteful number, since it uses less digits than its factorization.

55939040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18435 (or 18427 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 55939040 is about 7479.2406031629. The cubic root of 55939040 is about 382.4473620020.

The spelling of 55939040 in words is "fifty-five million, nine hundred thirty-nine thousand, forty".