55408764 has 24 divisors (see below), whose sum is σ = 129942400. Its totient is φ = 18375984.

The previous prime is 55408739. The next prime is 55408789. The reversal of 55408764 is 46780455.

It is an interprime number because it is at equal distance from previous prime (55408739) and next prime (55408789).

It is a super-2 number, since 2×55408764² = 6140262256015392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9214 + ... + 13989.

Almost surely, 2^55408764 is an apocalyptic number.

It is an amenable number.

55408764 is an abundant number, since it is smaller than the sum of its proper divisors (74533636).

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

55408764 is a wasteful number, since it uses less digits than its factorization.

55408764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23409 (or 23407 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 55408764 is about 7443.7063348845. The cubic root of 55408764 is about 381.2350489882.

The spelling of 55408764 in words is "fifty-five million, four hundred eight thousand, seven hundred sixty-four".