721929942 has 32 divisors (see below), whose sum is σ = 1611509760. Its totient is φ = 239560200.

The previous prime is 721929941. The next prime is 721929979. The reversal of 721929942 is 249929127.

It is a super-2 number, since 2×721929942² = 1042365682312246728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721929941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17934 + ... + 42017.

It is an arithmetic number, because the mean of its divisors is an integer number (50359680).

Almost surely, 2^721929942 is an apocalyptic number.

721929942 is an abundant number, since it is smaller than the sum of its proper divisors (889579818).

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

721929942 is a wasteful number, since it uses less digits than its factorization.

721929942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60185 (or 60179 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 721929942 is about 26868.7540090716. The cubic root of 721929942 is about 897.0810544087.

The spelling of 721929942 in words is "seven hundred twenty-one million, nine hundred twenty-nine thousand, nine hundred forty-two".