721463234 has 32 divisors (see below), whose sum is σ = 1127831040. Its totient is φ = 345945600.

The previous prime is 721463219. The next prime is 721463257. The reversal of 721463234 is 432364127.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 721463234.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 818474 + ... + 819354.

It is an arithmetic number, because the mean of its divisors is an integer number (35244720).

Almost surely, 2^721463234 is an apocalyptic number.

721463234 is a deficient number, since it is larger than the sum of its proper divisors (406367806).

721463234 is a wasteful number, since it uses less digits than its factorization.

721463234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106.

The product of its digits is 24192, while the sum is 32.

The square root of 721463234 is about 26860.0676469736. The cubic root of 721463234 is about 896.8876999323.

The spelling of 721463234 in words is "seven hundred twenty-one million, four hundred sixty-three thousand, two hundred thirty-four".