64999480 has 96 divisors (see below), whose sum is σ = 183284640. Its totient is φ = 20563200.

The previous prime is 64999477. The next prime is 64999481. The reversal of 64999480 is 8499946.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64999481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24205 + ... + 26755.

It is an arithmetic number, because the mean of its divisors is an integer number (1909215).

Almost surely, 2^64999480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64999480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91642320).

64999480 is an abundant number, since it is smaller than the sum of its proper divisors (118285160).

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

64999480 is a wasteful number, since it uses less digits than its factorization.

64999480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589 (or 2578 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 64999480 is about 8062.2254992031. The cubic root of 64999480 is about 402.0715036625.

The spelling of 64999480 in words is "sixty-four million, nine hundred ninety-nine thousand, four hundred eighty".