7813319004 has 72 divisors (see below), whose sum is σ = 20803058640. Its totient is φ = 2465793792.

The previous prime is 7813318973. The next prime is 7813319039. The reversal of 7813319004 is 4009133187.

It is a happy number.

It is a super-2 number, since 2×7813319004² (a number of 21 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 7813319004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1568662 + ... + 1573634.

It is an arithmetic number, because the mean of its divisors is an integer number (288931370).

Almost surely, 2^7813319004 is an apocalyptic number.

It is an amenable number.

7813319004 is an abundant number, since it is smaller than the sum of its proper divisors (12989739636).

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

7813319004 is a wasteful number, since it uses less digits than its factorization.

7813319004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7299 (or 7294 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 7813319004 is about 88392.9805131607. The cubic root of 7813319004 is about 1984.3206505540.

The spelling of 7813319004 in words is "seven billion, eight hundred thirteen million, three hundred nineteen thousand, four".