577542640 has 20 divisors (see below), whose sum is σ = 1342786824. Its totient is φ = 231017024.

The previous prime is 577542631. The next prime is 577542689. The reversal of 577542640 is 46245775.

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 = 577542593 and 577542602.

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, 3609562 + ... + 3609721.

Almost surely, 2^577542640 is an apocalyptic number.

It is an amenable number.

577542640 is an abundant number, since it is smaller than the sum of its proper divisors (765244184).

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

577542640 is a wasteful number, since it uses less digits than its factorization.

577542640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7219296 (or 7219290 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 40.

The square root of 577542640 is about 24032.1168439237. The cubic root of 577542640 is about 832.7756496255.

The spelling of 577542640 in words is "five hundred seventy-seven million, five hundred forty-two thousand, six hundred forty".