55708840 has 32 divisors (see below), whose sum is σ = 136740960. Its totient is φ = 20257600.

The previous prime is 55708819. The next prime is 55708841. The reversal of 55708840 is 4880755.

It is a self number, because there is not a number n which added to its sum of digits gives 55708840.

It is not an unprimeable number, because it can be changed into a prime (55708841) 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, 62866 + ... + 63745.

It is an arithmetic number, because the mean of its divisors is an integer number (4273155).

Almost surely, 2^55708840 is an apocalyptic number.

It is an amenable number.

55708840 is an abundant number, since it is smaller than the sum of its proper divisors (81032120).

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

55708840 is a wasteful number, since it uses less digits than its factorization.

55708840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126633 (or 126629 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 55708840 is about 7463.8354751428. The cubic root of 55708840 is about 381.9220256956.

The spelling of 55708840 in words is "fifty-five million, seven hundred eight thousand, eight hundred forty".