64985880 has 32 divisors (see below), whose sum is σ = 194958000. Its totient is φ = 17329536.

The previous prime is 64985873. The next prime is 64985881. The reversal of 64985880 is 8858946.

It is a super-3 number, since 3×64985880³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64985881) 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, 270655 + ... + 270894.

Almost surely, 2^64985880 is an apocalyptic number.

64985880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64985880 is an abundant number, since it is smaller than the sum of its proper divisors (129972120).

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

64985880 is a wasteful number, since it uses less digits than its factorization.

64985880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541563 (or 541559 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 64985880 is about 8061.3820155107. The cubic root of 64985880 is about 402.0434595722.

The spelling of 64985880 in words is "sixty-four million, nine hundred eighty-five thousand, eight hundred eighty".