55716420 has 24 divisors (see below), whose sum is σ = 156006144. Its totient is φ = 14857696.

The previous prime is 55716407. The next prime is 55716421. The reversal of 55716420 is 2461755.

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

It is not an unprimeable number, because it can be changed into a prime (55716421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464244 + ... + 464363.

It is an arithmetic number, because the mean of its divisors is an integer number (6500256).

Almost surely, 2^55716420 is an apocalyptic number.

It is an amenable number.

55716420 is an abundant number, since it is smaller than the sum of its proper divisors (100289724).

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

55716420 is a wasteful number, since it uses less digits than its factorization.

55716420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928619 (or 928617 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 55716420 is about 7464.3432396963. The cubic root of 55716420 is about 381.9393469302.

The spelling of 55716420 in words is "fifty-five million, seven hundred sixteen thousand, four hundred twenty".