55507392 has 84 divisors (see below), whose sum is σ = 164637720. Its totient is φ = 17859072.

The previous prime is 55507381. The next prime is 55507393. The reversal of 55507392 is 29370555.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55507393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15043 + ... + 18365.

Almost surely, 2^55507392 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 55507392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82318860).

55507392 is an abundant number, since it is smaller than the sum of its proper divisors (109130328).

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

55507392 is a wasteful number, since it uses less digits than its factorization.

55507392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3370 (or 3357 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 36.

The square root of 55507392 is about 7450.3283149134. The cubic root of 55507392 is about 381.4611152879.

The spelling of 55507392 in words is "fifty-five million, five hundred seven thousand, three hundred ninety-two".