55394040 has 64 divisors (see below), whose sum is σ = 178970400. Its totient is φ = 13635072.

The previous prime is 55394033. The next prime is 55394057. The reversal of 55394040 is 4049355.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55393989 and 55394007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16195 + ... + 19314.

Almost surely, 2^55394040 is an apocalyptic number.

It is an amenable number.

55394040 is an abundant number, since it is smaller than the sum of its proper divisors (123576360).

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

55394040 is a wasteful number, since it uses less digits than its factorization.

55394040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35536 (or 35532 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 55394040 is about 7442.7172457376. The cubic root of 55394040 is about 381.2012769412.

The spelling of 55394040 in words is "fifty-five million, three hundred ninety-four thousand, forty".