64994080 has 48 divisors (see below), whose sum is σ = 154083384. Its totient is φ = 25907200.

The previous prime is 64994071. The next prime is 64994081. The reversal of 64994080 is 8049946.

It can be written as a sum of positive squares in 4 ways, for example, as 50523664 + 14470416 = 7108^2 + 3804^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (64994081) 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, 63654 + ... + 64666.

Almost surely, 2^64994080 is an apocalyptic number.

It is an amenable number.

64994080 is an abundant number, since it is smaller than the sum of its proper divisors (89089304).

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

64994080 is a wasteful number, since it uses less digits than its factorization.

64994080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429 (or 1421 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 64994080 is about 8061.8905971242. The cubic root of 64994080 is about 402.0603689773.

The spelling of 64994080 in words is "sixty-four million, nine hundred ninety-four thousand, eighty".