738590721 has 32 divisors (see below), whose sum is σ = 1140480000. Its totient is φ = 420199680.

The previous prime is 738590711. The next prime is 738590737. The reversal of 738590721 is 127095837.

It is not a de Polignac number, because 738590721 - 2¹⁰ = 738589697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (738590711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244780 + ... + 247778.

It is an arithmetic number, because the mean of its divisors is an integer number (35640000).

It is a Proth number, since it is equal to 5635 ⋅ 2¹⁷ + 1 and 5635 < 2¹⁷.

Almost surely, 2^738590721 is an apocalyptic number.

It is an amenable number.

738590721 is a deficient number, since it is larger than the sum of its proper divisors (401889279).

738590721 is a wasteful number, since it uses less digits than its factorization.

738590721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 738590721 is about 27177.0256098786. The cubic root of 738590721 is about 903.9296161461.

The spelling of 738590721 in words is "seven hundred thirty-eight million, five hundred ninety thousand, seven hundred twenty-one".