64979040 has 192 divisors, whose sum is σ = 237758976. Its totient is φ = 14610432.

The previous prime is 64979029. The next prime is 64979077. The reversal of 64979040 is 4097946.

It is a self number, because there is not a number n which added to its sum of digits gives 64979040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278764 + ... + 278996.

It is an arithmetic number, because the mean of its divisors is an integer number (1238328).

Almost surely, 2^64979040 is an apocalyptic number.

64979040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64979040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118879488).

64979040 is an abundant number, since it is smaller than the sum of its proper divisors (172779936).

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

64979040 is a wasteful number, since it uses less digits than its factorization.

64979040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 64979040 is about 8060.9577594725. The cubic root of 64979040 is about 402.0293535656.

The spelling of 64979040 in words is "sixty-four million, nine hundred seventy-nine thousand, forty".