64980630 has 288 divisors, whose sum is σ = 219596832. Its totient is φ = 13685760.

The previous prime is 64980623. The next prime is 64980631. The reversal of 64980630 is 3608946.

64980630 = 832² + 833² + ... + 916².

64980630 is a `hidden beast` number, since 649 + 8 + 0 + 6 + 3 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64980631) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3822382 + ... + 3822398.

It is an arithmetic number, because the mean of its divisors is an integer number (762489).

Almost surely, 2^64980630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64980630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109798416).

64980630 is an abundant number, since it is smaller than the sum of its proper divisors (154616202).

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

64980630 is a wasteful number, since it uses less digits than its factorization.

64980630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 64980630 is about 8061.0563823856. The cubic root of 64980630 is about 402.0326326818.

The spelling of 64980630 in words is "sixty-four million, nine hundred eighty thousand, six hundred thirty".