55996420 has 48 divisors (see below), whose sum is σ = 125092800. Its totient is φ = 20995200.

The previous prime is 55996403. The next prime is 55996433. The reversal of 55996420 is 2469955.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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, 37651 + ... + 39109.

It is an arithmetic number, because the mean of its divisors is an integer number (2606100).

Almost surely, 2^55996420 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 55996420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62546400).

55996420 is an abundant number, since it is smaller than the sum of its proper divisors (69096380).

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

55996420 is a wasteful number, since it uses less digits than its factorization.

55996420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1586 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 55996420 is about 7483.0755709133. The cubic root of 55996420 is about 382.5780836502.

The spelling of 55996420 in words is "fifty-five million, nine hundred ninety-six thousand, four hundred twenty".