7222813920 has 144 divisors (see below), whose sum is σ = 28169013600. Its totient is φ = 1650926592.

The previous prime is 7222813879. The next prime is 7222813951. The reversal of 7222813920 is 293182227.

It is a tau number, because it is divible by the number of its divisors (144).

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

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, 348195 + ... + 368354.

It is an arithmetic number, because the mean of its divisors is an integer number (195618150).

Almost surely, 2^7222813920 is an apocalyptic number.

7222813920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7222813920 is an abundant number, since it is smaller than the sum of its proper divisors (20946199680).

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

7222813920 is a wasteful number, since it uses less digits than its factorization.

7222813920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716577 (or 716566 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 7222813920 is about 84987.1397330208. The cubic root of 7222813920 is about 1933.0161186516.

The spelling of 7222813920 in words is "seven billion, two hundred twenty-two million, eight hundred thirteen thousand, nine hundred twenty".