55990940 has 24 divisors (see below), whose sum is σ = 117724320. Its totient is φ = 22369088.

The previous prime is 55990939. The next prime is 55990943. The reversal of 55990940 is 4909955.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55990943) 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, 26441 + ... + 28479.

It is an arithmetic number, because the mean of its divisors is an integer number (4905180).

Almost surely, 2^55990940 is an apocalyptic number.

It is an amenable number.

55990940 is an abundant number, since it is smaller than the sum of its proper divisors (61733380).

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

55990940 is a wasteful number, since it uses less digits than its factorization.

55990940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421 (or 3419 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 55990940 is about 7482.7094023489. The cubic root of 55990940 is about 382.5656031125.

The spelling of 55990940 in words is "fifty-five million, nine hundred ninety thousand, nine hundred forty".