64342690 has 16 divisors (see below), whose sum is σ = 116053560. Its totient is φ = 25684480.

The previous prime is 64342669. The next prime is 64342699. The reversal of 64342690 is 9624346.

It can be written as a sum of positive squares in 4 ways, for example, as 38850289 + 25492401 = 6233^2 + 5049^2 .

It is a super-2 number, since 2×64342690² = 8279963512872200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64342699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1231 + ... + 11410.

Almost surely, 2^64342690 is an apocalyptic number.

64342690 is a deficient number, since it is larger than the sum of its proper divisors (51710870).

64342690 is a wasteful number, since it uses less digits than its factorization.

64342690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13157.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 64342690 is about 8021.3895304991. The cubic root of 64342690 is about 400.7126670102.

The spelling of 64342690 in words is "sixty-four million, three hundred forty-two thousand, six hundred ninety".