4640394690 has 64 divisors (see below), whose sum is σ = 12801110400. Its totient is φ = 1194766272.

The previous prime is 4640394659. The next prime is 4640394697. The reversal of 4640394690 is 964930464.

It is a happy number.

It is a super-2 number, since 2×4640394690² = 43066525757960392200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (4640394697) 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, 288492 + ... + 304151.

It is an arithmetic number, because the mean of its divisors is an integer number (200017350).

Almost surely, 2^4640394690 is an apocalyptic number.

4640394690 is an abundant number, since it is smaller than the sum of its proper divisors (8160715710).

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

4640394690 is a wasteful number, since it uses less digits than its factorization.

4640394690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592688 (or 592682 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 4640394690 is about 68120.4425264546. The cubic root of 4640394690 is about 1667.9574739430.

The spelling of 4640394690 in words is "four billion, six hundred forty million, three hundred ninety-four thousand, six hundred ninety".