55624778 has 8 divisors (see below), whose sum is σ = 91022400. Its totient is φ = 25283980.

The previous prime is 55624753. The next prime is 55624781. The reversal of 55624778 is 87742655.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1264178 + ... + 1264221.

It is an arithmetic number, because the mean of its divisors is an integer number (11377800).

Almost surely, 2^55624778 is an apocalyptic number.

55624778 is a deficient number, since it is larger than the sum of its proper divisors (35397622).

55624778 is a wasteful number, since it uses less digits than its factorization.

55624778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528412.

The product of its digits is 470400, while the sum is 44.

The square root of 55624778 is about 7458.2020621595. The cubic root of 55624778 is about 381.7298282439.

The spelling of 55624778 in words is "fifty-five million, six hundred twenty-four thousand, seven hundred seventy-eight".