64623405 has 48 divisors (see below), whose sum is σ = 131229504. Its totient is φ = 26853120.

The previous prime is 64623401. The next prime is 64623407. The reversal of 64623405 is 50432646.

It is not a de Polignac number, because 64623405 - 2² = 64623401 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 4089 + ... + 12081.

It is an arithmetic number, because the mean of its divisors is an integer number (2733948).

Almost surely, 2^64623405 is an apocalyptic number.

It is an amenable number.

64623405 is an abundant number, since it is smaller than the sum of its proper divisors (66606099).

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

64623405 is a wasteful number, since it uses less digits than its factorization.

64623405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8026 (or 8019 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 64623405 is about 8038.8683905137. The cubic root of 64623405 is about 401.2945661430.

The spelling of 64623405 in words is "sixty-four million, six hundred twenty-three thousand, four hundred five".