55972380 has 96 divisors (see below), whose sum is σ = 163614528. Its totient is φ = 14284800.

The previous prime is 55972351. The next prime is 55972387. The reversal of 55972380 is 8327955.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55972387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149874 + ... + 150246.

It is an arithmetic number, because the mean of its divisors is an integer number (1704318).

Almost surely, 2^55972380 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 55972380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81807264).

55972380 is an abundant number, since it is smaller than the sum of its proper divisors (107642148).

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

55972380 is a wasteful number, since it uses less digits than its factorization.

55972380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 55972380 is about 7481.4691070671. The cubic root of 55972380 is about 382.5233272116.

The spelling of 55972380 in words is "fifty-five million, nine hundred seventy-two thousand, three hundred eighty".