55870620 has 96 divisors (see below), whose sum is σ = 170698752. Its totient is φ = 13571328.

The previous prime is 55870613. The next prime is 55870651. The reversal of 55870620 is 2607855.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64309 + ... + 65171.

It is an arithmetic number, because the mean of its divisors is an integer number (1778112).

Almost surely, 2^55870620 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 55870620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85349376).

55870620 is an abundant number, since it is smaller than the sum of its proper divisors (114828132).

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

55870620 is a wasteful number, since it uses less digits than its factorization.

55870620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 55870620 is about 7474.6652098940. The cubic root of 55870620 is about 382.2913724091.

The spelling of 55870620 in words is "fifty-five million, eight hundred seventy thousand, six hundred twenty".