55720704 has 72 divisors (see below), whose sum is σ = 159734512. Its totient is φ = 17141760.

The previous prime is 55720703. The next prime is 55720723. The reversal of 55720704 is 40702755.

It is not an unprimeable number, because it can be changed into a prime (55720703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7194 + ... + 12774.

Almost surely, 2^55720704 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 55720704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79867256).

55720704 is an abundant number, since it is smaller than the sum of its proper divisors (104013808).

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

55720704 is a wasteful number, since it uses less digits than its factorization.

55720704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613 (or 5599 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 55720704 is about 7464.6301984760. The cubic root of 55720704 is about 381.9491357036.

The spelling of 55720704 in words is "fifty-five million, seven hundred twenty thousand, seven hundred four".