721648074 has 32 divisors (see below), whose sum is σ = 1694065536. Its totient is φ = 200612160.

The previous prime is 721648073. The next prime is 721648097. The reversal of 721648074 is 470846127.

721648074 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (721648073) 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, 230637 + ... + 233744.

It is an arithmetic number, because the mean of its divisors is an integer number (52939548).

Almost surely, 2^721648074 is an apocalyptic number.

721648074 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

721648074 is an abundant number, since it is smaller than the sum of its proper divisors (972417462).

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

721648074 is a wasteful number, since it uses less digits than its factorization.

721648074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464430.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 721648074 is about 26863.5082221217. The cubic root of 721648074 is about 896.9642880654.

The spelling of 721648074 in words is "seven hundred twenty-one million, six hundred forty-eight thousand, seventy-four".