64736490 has 128 divisors (see below), whose sum is σ = 199729152. Its totient is φ = 13052160.

The previous prime is 64736489. The next prime is 64736519. The reversal of 64736490 is 9463746.

It is a super-4 number, since 4×64736490⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62275 + ... + 63305.

It is an arithmetic number, because the mean of its divisors is an integer number (1560384).

Almost surely, 2^64736490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64736490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99864576).

64736490 is an abundant number, since it is smaller than the sum of its proper divisors (134992662).

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

64736490 is a wasteful number, since it uses less digits than its factorization.

64736490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 64736490 is about 8045.8989553685. The cubic root of 64736490 is about 401.5285059012.

The spelling of 64736490 in words is "sixty-four million, seven hundred thirty-six thousand, four hundred ninety".