64123402 has 32 divisors (see below), whose sum is σ = 115944192. Its totient is φ = 26002944.

The previous prime is 64123399. The next prime is 64123421. The reversal of 64123402 is 20432146.

It is a happy number.

It is a super-2 number, since 2×64123402² = 8223621368107208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30208 + ... + 32260.

It is an arithmetic number, because the mean of its divisors is an integer number (3623256).

Almost surely, 2^64123402 is an apocalyptic number.

64123402 is a deficient number, since it is larger than the sum of its proper divisors (51820790).

64123402 is a wasteful number, since it uses less digits than its factorization.

64123402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 64123402 is about 8007.7089107934. The cubic root of 64123402 is about 400.2569224418.

Adding to 64123402 its reverse (20432146), we get a palindrome (84555548).

The spelling of 64123402 in words is "sixty-four million, one hundred twenty-three thousand, four hundred two".