55428730 has 32 divisors (see below), whose sum is σ = 115966080. Its totient is φ = 18680640.

The previous prime is 55428623. The next prime is 55428767. The reversal of 55428730 is 3782455.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2581 + ... + 10840.

It is an arithmetic number, because the mean of its divisors is an integer number (3623940).

Almost surely, 2^55428730 is an apocalyptic number.

55428730 is an abundant number, since it is smaller than the sum of its proper divisors (60537350).

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

55428730 is a wasteful number, since it uses less digits than its factorization.

55428730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13494.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 55428730 is about 7445.0473470623. The cubic root of 55428730 is about 381.2808349154.

The spelling of 55428730 in words is "fifty-five million, four hundred twenty-eight thousand, seven hundred thirty".