55620328 has 32 divisors (see below), whose sum is σ = 113002560. Its totient is φ = 25562880.

The previous prime is 55620307. The next prime is 55620329. The reversal of 55620328 is 82302655.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55620328.

It is not an unprimeable number, because it can be changed into a prime (55620329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093 + ... + 10603.

It is an arithmetic number, because the mean of its divisors is an integer number (3531330).

Almost surely, 2^55620328 is an apocalyptic number.

It is an amenable number.

55620328 is an abundant number, since it is smaller than the sum of its proper divisors (57382232).

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

55620328 is a wasteful number, since it uses less digits than its factorization.

55620328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9577 (or 9573 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 55620328 is about 7457.9037269195. The cubic root of 55620328 is about 381.7196484697.

The spelling of 55620328 in words is "fifty-five million, six hundred twenty thousand, three hundred twenty-eight".