55403646 has 32 divisors (see below), whose sum is σ = 117803808. Its totient is φ = 17310720.

The previous prime is 55403633. The next prime is 55403653. The reversal of 55403646 is 64630455.

It is a congruent 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, 27696 + ... + 29628.

It is an arithmetic number, because the mean of its divisors is an integer number (3681369).

Almost surely, 2^55403646 is an apocalyptic number.

55403646 is an abundant number, since it is smaller than the sum of its proper divisors (62400162).

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

55403646 is a wasteful number, since it uses less digits than its factorization.

55403646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 55403646 is about 7443.3625465914. The cubic root of 55403646 is about 381.2233106462.

The spelling of 55403646 in words is "fifty-five million, four hundred three thousand, six hundred forty-six".