657212652 has 36 divisors (see below), whose sum is σ = 1663782120. Its totient is φ = 218741952.

The previous prime is 657212651. The next prime is 657212659. The reversal of 657212652 is 256212756.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (657212651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11224 + ... + 37952.

It is an arithmetic number, because the mean of its divisors is an integer number (46216170).

Almost surely, 2^657212652 is an apocalyptic number.

It is an amenable number.

657212652 is an abundant number, since it is smaller than the sum of its proper divisors (1006569468).

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

657212652 is a wasteful number, since it uses less digits than its factorization.

657212652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27422 (or 27417 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 657212652 is about 25636.1590726848. The cubic root of 657212652 is about 869.4313684157.

The spelling of 657212652 in words is "six hundred fifty-seven million, two hundred twelve thousand, six hundred fifty-two".