64490896 has 40 divisors (see below), whose sum is σ = 134902080. Its totient is φ = 29774976.

The previous prime is 64490893. The next prime is 64490929. The reversal of 64490896 is 69809446.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64490893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7651 + ... + 13693.

It is an arithmetic number, because the mean of its divisors is an integer number (3372552).

Almost surely, 2^64490896 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 64490896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67451040).

64490896 is an abundant number, since it is smaller than the sum of its proper divisors (70411184).

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

64490896 is a wasteful number, since it uses less digits than its factorization.

64490896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103 (or 6097 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 64490896 is about 8030.6223918200. The cubic root of 64490896 is about 401.0200962974.

The spelling of 64490896 in words is "sixty-four million, four hundred ninety thousand, eight hundred ninety-six".