55477870 has 32 divisors (see below), whose sum is σ = 118065600. Its totient is φ = 18364416.

The previous prime is 55477867. The next prime is 55477871. The reversal of 55477870 is 7877455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55477871) 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, 11635 + ... + 15694.

It is an arithmetic number, because the mean of its divisors is an integer number (3689550).

Almost surely, 2^55477870 is an apocalyptic number.

55477870 is an abundant number, since it is smaller than the sum of its proper divisors (62587730).

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

55477870 is a wasteful number, since it uses less digits than its factorization.

55477870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27372.

The product of its (nonzero) digits is 274400, while the sum is 43.

The square root of 55477870 is about 7448.3467964374. The cubic root of 55477870 is about 381.3934756954.

The spelling of 55477870 in words is "fifty-five million, four hundred seventy-seven thousand, eight hundred seventy".