64408620 has 48 divisors (see below), whose sum is σ = 180861408. Its totient is φ = 17126400.

The previous prime is 64408577. The next prime is 64408633. The reversal of 64408620 is 2680446.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 22722 + ... + 25398.

It is an arithmetic number, because the mean of its divisors is an integer number (3767946).

Almost surely, 2^64408620 is an apocalyptic number.

64408620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64408620 is an abundant number, since it is smaller than the sum of its proper divisors (116452788).

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

64408620 is a wasteful number, since it uses less digits than its factorization.

64408620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090 (or 3088 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 64408620 is about 8025.4981153820. The cubic root of 64408620 is about 400.8494863220.

The spelling of 64408620 in words is "sixty-four million, four hundred eight thousand, six hundred twenty".