55140528 has 20 divisors (see below), whose sum is σ = 142446488. Its totient is φ = 18380160.

The previous prime is 55140493. The next prime is 55140539. The reversal of 55140528 is 82504155.

It is a junction number, because it is equal to n+sod(n) for n = 55140495 and 55140504.

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, 574333 + ... + 574428.

Almost surely, 2^55140528 is an apocalyptic number.

It is an amenable number.

55140528 is an abundant number, since it is smaller than the sum of its proper divisors (87305960).

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

55140528 is a wasteful number, since it uses less digits than its factorization.

55140528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148772 (or 1148766 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 55140528 is about 7425.6668387425. Note that the first 3 decimals coincide. The cubic root of 55140528 is about 380.6188623124.

The spelling of 55140528 in words is "fifty-five million, one hundred forty thousand, five hundred twenty-eight".