64530402 has 32 divisors (see below), whose sum is σ = 137313792. Its totient is φ = 20146944.

The previous prime is 64530397. The next prime is 64530407. The reversal of 64530402 is 20403546.

It is an interprime number because it is at equal distance from previous prime (64530397) and next prime (64530407).

It is not an unprimeable number, because it can be changed into a prime (64530407) 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, 21328 + ... + 24164.

It is an arithmetic number, because the mean of its divisors is an integer number (4291056).

Almost surely, 2^64530402 is an apocalyptic number.

64530402 is an abundant number, since it is smaller than the sum of its proper divisors (72783390).

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

64530402 is a wasteful number, since it uses less digits than its factorization.

64530402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 64530402 is about 8033.0817249671. The cubic root of 64530402 is about 401.1019655586.

Adding to 64530402 its reverse (20403546), we get a palindrome (84933948).

The spelling of 64530402 in words is "sixty-four million, five hundred thirty thousand, four hundred two".