721960442 has 32 divisors (see below), whose sum is σ = 1304371200. Its totient is φ = 292770288.

The previous prime is 721960441. The next prime is 721960453. The reversal of 721960442 is 244069127.

It is not an unprimeable number, because it can be changed into a prime (721960441) 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, 409559 + ... + 411317.

It is an arithmetic number, because the mean of its divisors is an integer number (40761600).

Almost surely, 2^721960442 is an apocalyptic number.

721960442 is a deficient number, since it is larger than the sum of its proper divisors (582410758).

721960442 is a wasteful number, since it uses less digits than its factorization.

721960442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 721960442 is about 26869.3215768467. The cubic root of 721960442 is about 897.0936874844.

The spelling of 721960442 in words is "seven hundred twenty-one million, nine hundred sixty thousand, four hundred forty-two".