64800690 has 32 divisors (see below), whose sum is σ = 159727680. Its totient is φ = 16812864.

The previous prime is 64800677. The next prime is 64800739. The reversal of 64800690 is 9600846.

It is a super-2 number, since 2×64800690² = 8398258848952200, 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, 28080 + ... + 30299.

It is an arithmetic number, because the mean of its divisors is an integer number (4991490).

Almost surely, 2^64800690 is an apocalyptic number.

64800690 is an abundant number, since it is smaller than the sum of its proper divisors (94926990).

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

64800690 is a wasteful number, since it uses less digits than its factorization.

64800690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58426.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 64800690 is about 8049.8875768547. The cubic root of 64800690 is about 401.6611956885.

The spelling of 64800690 in words is "sixty-four million, eight hundred thousand, six hundred ninety".