55907712 has 128 divisors (see below), whose sum is σ = 188659200. Its totient is φ = 15966720.

The previous prime is 55907701. The next prime is 55907717. The reversal of 55907712 is 21770955.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×55907712² = 6251344522149888, which contains 22 as substring.

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 (55907717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23037 + ... + 25347.

It is an arithmetic number, because the mean of its divisors is an integer number (1473900).

Almost surely, 2^55907712 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 55907712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94329600).

55907712 is an abundant number, since it is smaller than the sum of its proper divisors (132751488).

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

55907712 is a wasteful number, since it uses less digits than its factorization.

55907712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341 (or 2323 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 55907712 is about 7477.1459795834. The cubic root of 55907712 is about 382.3759536241.

The spelling of 55907712 in words is "fifty-five million, nine hundred seven thousand, seven hundred twelve".