55691392 has 32 divisors (see below), whose sum is σ = 111384000. Its totient is φ = 27736320.

The previous prime is 55691369. The next prime is 55691453. The reversal of 55691392 is 29319655.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×55691392² = 6203062285795328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39109 + ... + 40507.

It is an arithmetic number, because the mean of its divisors is an integer number (3480750).

Almost surely, 2^55691392 is an apocalyptic number.

It is an amenable number.

55691392 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

55691392 is a wasteful number, since it uses less digits than its factorization.

55691392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724 (or 1712 counting only the distinct ones).

The product of its digits is 72900, while the sum is 40.

The square root of 55691392 is about 7462.6665475552. Note that the first 3 decimals coincide. The cubic root of 55691392 is about 381.8821488925.

The spelling of 55691392 in words is "fifty-five million, six hundred ninety-one thousand, three hundred ninety-two".