55503028 has 72 divisors (see below), whose sum is σ = 124470080. Its totient is φ = 21209472.

The previous prime is 55502987. The next prime is 55503037. The reversal of 55503028 is 82030555.

It is a super-2 number, since 2×55503028² = 6161172234337568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 55502987 and 55503005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2921203 + ... + 2921221.

Almost surely, 2^55503028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55503028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62235040).

55503028 is an abundant number, since it is smaller than the sum of its proper divisors (68967052).

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

55503028 is a wasteful number, since it uses less digits than its factorization.

55503028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 55503028 is about 7450.0354361573. The cubic root of 55503028 is about 381.4511181814.

The spelling of 55503028 in words is "fifty-five million, five hundred three thousand, twenty-eight".