64623406 has 12 divisors (see below), whose sum is σ = 100165896. Its totient is φ = 31268460.

The previous prime is 64623401. The next prime is 64623407. The reversal of 64623406 is 60432646.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64623401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14890 + ... + 18733.

It is an arithmetic number, because the mean of its divisors is an integer number (8347158).

Almost surely, 2^64623406 is an apocalyptic number.

64623406 is a deficient number, since it is larger than the sum of its proper divisors (35542490).

64623406 is a wasteful number, since it uses less digits than its factorization.

64623406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33687 (or 33656 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 64623406 is about 8038.8684527115. The cubic root of 64623406 is about 401.2945682129.

The spelling of 64623406 in words is "sixty-four million, six hundred twenty-three thousand, four hundred six".