55729878 has 16 divisors (see below), whose sum is σ = 115055616. Its totient is φ = 17977320.

The previous prime is 55729873. The next prime is 55729913. The reversal of 55729878 is 87892755.

It is a self number, because there is not a number n which added to its sum of digits gives 55729878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55729873) 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, 149626 + ... + 149997.

It is an arithmetic number, because the mean of its divisors is an integer number (7190976).

Almost surely, 2^55729878 is an apocalyptic number.

55729878 is an abundant number, since it is smaller than the sum of its proper divisors (59325738).

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

55729878 is a wasteful number, since it uses less digits than its factorization.

55729878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299659.

The product of its digits is 1411200, while the sum is 51.

The square root of 55729878 is about 7465.2446711411. The cubic root of 55729878 is about 381.9700962493.

The spelling of 55729878 in words is "fifty-five million, seven hundred twenty-nine thousand, eight hundred seventy-eight".