55248840 has 48 divisors (see below), whose sum is σ = 179559900. Its totient is φ = 14732928.

The previous prime is 55248833. The next prime is 55248841. The reversal of 55248840 is 4884255.

It can be written as a sum of positive squares in 2 ways, for example, as 52446564 + 2802276 = 7242^2 + 1674^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55248795 and 55248804.

It is not an unprimeable number, because it can be changed into a prime (55248841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76375 + ... + 77094.

Almost surely, 2^55248840 is an apocalyptic number.

It is an amenable number.

55248840 is an abundant number, since it is smaller than the sum of its proper divisors (124311060).

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

55248840 is a wasteful number, since it uses less digits than its factorization.

55248840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153486 (or 153479 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 55248840 is about 7432.9563432056. The cubic root of 55248840 is about 380.8679146164.

The spelling of 55248840 in words is "fifty-five million, two hundred forty-eight thousand, eight hundred forty".