55712538 has 96 divisors (see below), whose sum is σ = 145267200. Its totient is φ = 15095808.

The previous prime is 55712513. The next prime is 55712539. The reversal of 55712538 is 83521755.

55712538 is a `hidden beast` number, since 55 + 71 + 2 + 538 = 666.

It is not an unprimeable number, because it can be changed into a prime (55712539) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 288570 + ... + 288762.

It is an arithmetic number, because the mean of its divisors is an integer number (1513200).

Almost surely, 2^55712538 is an apocalyptic number.

55712538 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55712538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72633600).

55712538 is an abundant number, since it is smaller than the sum of its proper divisors (89554662).

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

55712538 is a wasteful number, since it uses less digits than its factorization.

55712538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 313 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 55712538 is about 7464.0831988932. The cubic root of 55712538 is about 381.9304762778.

The spelling of 55712538 in words is "fifty-five million, seven hundred twelve thousand, five hundred thirty-eight".