721371468 has 24 divisors (see below), whose sum is σ = 1691926768. Its totient is φ = 239210496.

The previous prime is 721371467. The next prime is 721371481. The reversal of 721371468 is 864173127.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (721371467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153421 + ... + 158052.

Almost surely, 2^721371468 is an apocalyptic number.

It is an amenable number.

721371468 is an abundant number, since it is smaller than the sum of its proper divisors (970555300).

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

721371468 is a wasteful number, since it uses less digits than its factorization.

721371468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311673 (or 311671 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 721371468 is about 26858.3593691052. The cubic root of 721371468 is about 896.8496719901.

The spelling of 721371468 in words is "seven hundred twenty-one million, three hundred seventy-one thousand, four hundred sixty-eight".