764405642 has 96 divisors (see below), whose sum is σ = 1570872576. Its totient is φ = 271434240.

The previous prime is 764405633. The next prime is 764405651. The reversal of 764405642 is 246504467.

It is an interprime number because it is at equal distance from previous prime (764405633) and next prime (764405651).

It is a junction number, because it is equal to n+sod(n) for n = 764405596 and 764405605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2268098 + ... + 2268434.

It is an arithmetic number, because the mean of its divisors is an integer number (16363256).

Almost surely, 2^764405642 is an apocalyptic number.

764405642 is an abundant number, since it is smaller than the sum of its proper divisors (806466934).

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

764405642 is a wasteful number, since it uses less digits than its factorization.

764405642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 38.

The square root of 764405642 is about 27647.8867546871. The cubic root of 764405642 is about 914.3405091857.

The spelling of 764405642 in words is "seven hundred sixty-four million, four hundred five thousand, six hundred forty-two".