55420408 has 16 divisors (see below), whose sum is σ = 110026080. Its totient is φ = 26080128.

The previous prime is 55420381. The next prime is 55420427. The reversal of 55420408 is 80402455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203616 + ... + 203887.

It is an arithmetic number, because the mean of its divisors is an integer number (6876630).

Almost surely, 2^55420408 is an apocalyptic number.

It is an amenable number.

55420408 is a deficient number, since it is larger than the sum of its proper divisors (54605672).

55420408 is a wasteful number, since it uses less digits than its factorization.

55420408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407526 (or 407522 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 55420408 is about 7444.4884310475. The cubic root of 55420408 is about 381.2617522849.

The spelling of 55420408 in words is "fifty-five million, four hundred twenty thousand, four hundred eight".