55761888 has 144 divisors (see below), whose sum is σ = 181512576. Its totient is φ = 14676480.

The previous prime is 55761863. The next prime is 55761907. The reversal of 55761888 is 88816755.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113323 + ... + 113813.

It is an arithmetic number, because the mean of its divisors is an integer number (1260504).

Almost surely, 2^55761888 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 55761888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90756288).

55761888 is an abundant number, since it is smaller than the sum of its proper divisors (125750688).

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

55761888 is a wasteful number, since it uses less digits than its factorization.

55761888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537 (or 516 counting only the distinct ones).

The product of its digits is 537600, while the sum is 48.

The square root of 55761888 is about 7467.3882984615. The cubic root of 55761888 is about 382.0432139557.

The spelling of 55761888 in words is "fifty-five million, seven hundred sixty-one thousand, eight hundred eighty-eight".