722949920 has 288 divisors, whose sum is σ = 2215273536. Its totient is φ = 220416000.

The previous prime is 722949907. The next prime is 722949967. The reversal of 722949920 is 29949227.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 7157870 + ... + 7157970.

It is an arithmetic number, because the mean of its divisors is an integer number (7691922).

Almost surely, 2^722949920 is an apocalyptic number.

722949920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722949920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1107636768).

722949920 is an abundant number, since it is smaller than the sum of its proper divisors (1492323616).

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

722949920 is a wasteful number, since it uses less digits than its factorization.

722949920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 722949920 is about 26887.7280557506. The cubic root of 722949920 is about 897.5033356228.

The spelling of 722949920 in words is "seven hundred twenty-two million, nine hundred forty-nine thousand, nine hundred twenty".