64520434 has 16 divisors (see below), whose sum is σ = 105707520. Its totient is φ = 29291760.

The previous prime is 64520431. The next prime is 64520441. The reversal of 64520434 is 43402546.

It is not an unprimeable number, because it can be changed into a prime (64520431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26992 + ... + 29284.

It is an arithmetic number, because the mean of its divisors is an integer number (6606720).

Almost surely, 2^64520434 is an apocalyptic number.

64520434 is a deficient number, since it is larger than the sum of its proper divisors (41187086).

64520434 is a wasteful number, since it uses less digits than its factorization.

64520434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 64520434 is about 8032.4612666355. The cubic root of 64520434 is about 401.0813117781.

The spelling of 64520434 in words is "sixty-four million, five hundred twenty thousand, four hundred thirty-four".