55553628 has 24 divisors (see below), whose sum is σ = 139596688. Its totient is φ = 17093376.

The previous prime is 55553627. The next prime is 55553629. The reversal of 55553628 is 82635555.

It is an interprime number because it is at equal distance from previous prime (55553627) and next prime (55553629).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55553621) 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, 177901 + ... + 178212.

Almost surely, 2^55553628 is an apocalyptic number.

It is an amenable number.

55553628 is an abundant number, since it is smaller than the sum of its proper divisors (84043060).

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

55553628 is a wasteful number, since it uses less digits than its factorization.

55553628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356133 (or 356131 counting only the distinct ones).

The product of its digits is 180000, while the sum is 39.

The square root of 55553628 is about 7453.4306195201. The cubic root of 55553628 is about 381.5670011328.

The spelling of 55553628 in words is "fifty-five million, five hundred fifty-three thousand, six hundred twenty-eight".