64434402 has 24 divisors (see below), whose sum is σ = 139804236. Its totient is φ = 21447936.

The previous prime is 64434367. The next prime is 64434443. The reversal of 64434402 is 20443446.

It can be written as a sum of positive squares in 2 ways, for example, as 49154121 + 15280281 = 7011^2 + 3909^2 .

It is a super-2 number, since 2×64434402² = 8303584322195208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13338 + ... + 17514.

Almost surely, 2^64434402 is an apocalyptic number.

64434402 is an abundant number, since it is smaller than the sum of its proper divisors (75369834).

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

64434402 is a wasteful number, since it uses less digits than its factorization.

64434402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042 (or 5039 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 64434402 is about 8027.1042101121. The cubic root of 64434402 is about 400.9029642717.

Adding to 64434402 its reverse (20443446), we get a palindrome (84877848).

The spelling of 64434402 in words is "sixty-four million, four hundred thirty-four thousand, four hundred two".