634400265 has 32 divisors (see below), whose sum is σ = 1032742656. Its totient is φ = 332478720.

The previous prime is 634400209. The next prime is 634400267. The reversal of 634400265 is 562004436.

It is not a de Polignac number, because 634400265 - 2¹¹ = 634398217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (634400267) 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, 396447 + ... + 398043.

It is an arithmetic number, because the mean of its divisors is an integer number (32273208).

Almost surely, 2^634400265 is an apocalyptic number.

It is an amenable number.

634400265 is a deficient number, since it is larger than the sum of its proper divisors (398342391).

634400265 is a wasteful number, since it uses less digits than its factorization.

634400265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 634400265 is about 25187.3036468773. The cubic root of 634400265 is about 859.2531216072.

The spelling of 634400265 in words is "six hundred thirty-four million, four hundred thousand, two hundred sixty-five".