578401656 has 32 divisors (see below), whose sum is σ = 1652576640. Its totient is φ = 165257568.

The previous prime is 578401651. The next prime is 578401679. The reversal of 578401656 is 656104875.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (578401651) 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, 1721266 + ... + 1721601.

It is an arithmetic number, because the mean of its divisors is an integer number (51643020).

Almost surely, 2^578401656 is an apocalyptic number.

578401656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

578401656 is an abundant number, since it is smaller than the sum of its proper divisors (1074174984).

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

578401656 is a wasteful number, since it uses less digits than its factorization.

578401656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442883 (or 3442879 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 578401656 is about 24049.9824532161. The cubic root of 578401656 is about 833.1883252042.

The spelling of 578401656 in words is "five hundred seventy-eight million, four hundred one thousand, six hundred fifty-six".