55423872 has 256 divisors, whose sum is σ = 195840000. Its totient is φ = 15095808.

The previous prime is 55423867. The next prime is 55423883. The reversal of 55423872 is 27832455.

55423872 is a `hidden beast` number, since 554 + 2 + 38 + 72 = 666.

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

Its product of digits (67200) is a multiple of the sum of its prime divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 701529 + ... + 701607.

It is an arithmetic number, because the mean of its divisors is an integer number (765000).

Almost surely, 2^55423872 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 55423872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97920000).

55423872 is an abundant number, since it is smaller than the sum of its proper divisors (140416128).

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

55423872 is a wasteful number, since it uses less digits than its factorization.

55423872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 120 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 55423872 is about 7444.7210827539. The cubic root of 55423872 is about 381.2696955874.

The spelling of 55423872 in words is "fifty-five million, four hundred twenty-three thousand, eight hundred seventy-two".