721940748 has 24 divisors (see below), whose sum is σ = 1690752000. Its totient is φ = 239757840.

The previous prime is 721940729. The next prime is 721940753. The reversal of 721940748 is 847049127.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107748 + ... + 114251.

It is an arithmetic number, because the mean of its divisors is an integer number (70448000).

Almost surely, 2^721940748 is an apocalyptic number.

It is an amenable number.

721940748 is an abundant number, since it is smaller than the sum of its proper divisors (968811252).

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

721940748 is a wasteful number, since it uses less digits than its factorization.

721940748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222277 (or 222275 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 721940748 is about 26868.9550969144. The cubic root of 721940748 is about 897.0855302860.

The spelling of 721940748 in words is "seven hundred twenty-one million, nine hundred forty thousand, seven hundred forty-eight".