731620265 has 16 divisors (see below), whose sum is σ = 917228880. Its totient is φ = 559507200.

The previous prime is 731620261. The next prime is 731620291. The reversal of 731620265 is 562026137.

It can be written as a sum of positive squares in 8 ways, for example, as 8386816 + 723233449 = 2896^2 + 26893^2 .

It is not a de Polignac number, because 731620265 - 2² = 731620261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (731620261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10334 + ... + 39623.

It is an arithmetic number, because the mean of its divisors is an integer number (57326805).

Almost surely, 2^731620265 is an apocalyptic number.

It is an amenable number.

731620265 is a deficient number, since it is larger than the sum of its proper divisors (185608615).

731620265 is a wasteful number, since it uses less digits than its factorization.

731620265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50092.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 731620265 is about 27048.4799018355. The cubic root of 731620265 is about 901.0770090082.

The spelling of 731620265 in words is "seven hundred thirty-one million, six hundred twenty thousand, two hundred sixty-five".