578550640 has 20 divisors (see below), whose sum is σ = 1345130424. Its totient is φ = 231420224.

The previous prime is 578550629. The next prime is 578550653. The reversal of 578550640 is 46055875.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 578550593 and 578550602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3615862 + ... + 3616021.

Almost surely, 2^578550640 is an apocalyptic number.

It is an amenable number.

578550640 is an abundant number, since it is smaller than the sum of its proper divisors (766579784).

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

578550640 is a wasteful number, since it uses less digits than its factorization.

578550640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7231896 (or 7231890 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 578550640 is about 24053.0796365039. The cubic root of 578550640 is about 833.2598562771.

The spelling of 578550640 in words is "five hundred seventy-eight million, five hundred fifty thousand, six hundred forty".