64603980 has 192 divisors, whose sum is σ = 233640960. Its totient is φ = 14696640.

The previous prime is 64603921. The next prime is 64603999. The reversal of 64603980 is 8930646.

64603980 is a `hidden beast` number, since 646 + 0 + 3 + 9 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 306075 + ... + 306285.

It is an arithmetic number, because the mean of its divisors is an integer number (1216880).

Almost surely, 2^64603980 is an apocalyptic number.

64603980 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 64603980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116820480).

64603980 is an abundant number, since it is smaller than the sum of its proper divisors (169036980).

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

64603980 is a wasteful number, since it uses less digits than its factorization.

64603980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 228 counting only the distinct ones).

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

The square root of 64603980 is about 8037.6601072700. The cubic root of 64603980 is about 401.2543540448.

It can be divided in two parts, 6460 and 3980, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 64603980 in words is "sixty-four million, six hundred three thousand, nine hundred eighty".