656819436 has 96 divisors (see below), whose sum is σ = 1985589760. Its totient is φ = 164104704.

The previous prime is 656819419. The next prime is 656819437. The reversal of 656819436 is 634918656.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (656819437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4920 + ... + 36576.

Almost surely, 2^656819436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656819436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992794880).

656819436 is an abundant number, since it is smaller than the sum of its proper divisors (1328770324).

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

656819436 is a wasteful number, since it uses less digits than its factorization.

656819436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31703 (or 31701 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The square root of 656819436 is about 25628.4887576306. The cubic root of 656819436 is about 869.2579377264.

The spelling of 656819436 in words is "six hundred fifty-six million, eight hundred nineteen thousand, four hundred thirty-six".