657435020 has 24 divisors (see below), whose sum is σ = 1506124368. Its totient is φ = 239067200.

The previous prime is 657434989. The next prime is 657435049. The reversal of 657435020 is 20534756.

657435020 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1493951 + ... + 1494390.

It is an arithmetic number, because the mean of its divisors is an integer number (62755182).

Almost surely, 2^657435020 is an apocalyptic number.

It is an amenable number.

657435020 is an abundant number, since it is smaller than the sum of its proper divisors (848689348).

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

657435020 is a wasteful number, since it uses less digits than its factorization.

657435020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988361 (or 2988359 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 657435020 is about 25640.4957050366. The cubic root of 657435020 is about 869.5294147701.

Adding to 657435020 its reverse (20534756), we get a palindrome (677969776).

The spelling of 657435020 in words is "six hundred fifty-seven million, four hundred thirty-five thousand, twenty".