55533940 has 48 divisors (see below), whose sum is σ = 145401984. Its totient is φ = 17308800.

The previous prime is 55533923. The next prime is 55533943. The reversal of 55533940 is 4933555.

It is a happy number.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 55533896 and 55533905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55533943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16491 + ... + 19570.

It is an arithmetic number, because the mean of its divisors is an integer number (3029208).

Almost surely, 2^55533940 is an apocalyptic number.

It is an amenable number.

55533940 is an abundant number, since it is smaller than the sum of its proper divisors (89868044).

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

55533940 is a wasteful number, since it uses less digits than its factorization.

55533940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36088 (or 36086 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 34.

The square root of 55533940 is about 7452.1097683810. The cubic root of 55533940 is about 381.5219204963.

The spelling of 55533940 in words is "fifty-five million, five hundred thirty-three thousand, nine hundred forty".