55690368 has 128 divisors (see below), whose sum is σ = 165240000. Its totient is φ = 16515072.

The previous prime is 55690367. The next prime is 55690373. The reversal of 55690368 is 86309655.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (55690367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123808 + ... + 124256.

Almost surely, 2^55690368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55690368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82620000).

55690368 is an abundant number, since it is smaller than the sum of its proper divisors (109549632).

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

55690368 is a wasteful number, since it uses less digits than its factorization.

55690368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 55690368 is about 7462.5979390558. The cubic root of 55690368 is about 381.8798083171.

The spelling of 55690368 in words is "fifty-five million, six hundred ninety thousand, three hundred sixty-eight".