64988646 has 16 divisors (see below), whose sum is σ = 130324800. Its totient is φ = 21604968.

The previous prime is 64988591. The next prime is 64988657. The reversal of 64988646 is 64688946.

It is a super-3 number, since 3×64988646³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12016 + ... + 16563.

It is an arithmetic number, because the mean of its divisors is an integer number (8145300).

Almost surely, 2^64988646 is an apocalyptic number.

64988646 is an abundant number, since it is smaller than the sum of its proper divisors (65336154).

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

64988646 is a wasteful number, since it uses less digits than its factorization.

64988646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28963.

The product of its digits is 1990656, while the sum is 51.

The square root of 64988646 is about 8061.5535723581. The cubic root of 64988646 is about 402.0491635622.

The spelling of 64988646 in words is "sixty-four million, nine hundred eighty-eight thousand, six hundred forty-six".