64400326 has 16 divisors (see below), whose sum is σ = 100108800. Its totient is φ = 31049928.

The previous prime is 64400321. The next prime is 64400341. The reversal of 64400326 is 62300446.

It is a self number, because there is not a number n which added to its sum of digits gives 64400326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64400321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2055 + ... + 11533.

It is an arithmetic number, because the mean of its divisors is an integer number (6256800).

Almost surely, 2^64400326 is an apocalyptic number.

64400326 is a deficient number, since it is larger than the sum of its proper divisors (35708474).

64400326 is a wasteful number, since it uses less digits than its factorization.

64400326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9603.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 64400326 is about 8024.9813706949. The cubic root of 64400326 is about 400.8322795757.

The spelling of 64400326 in words is "sixty-four million, four hundred thousand, three hundred twenty-six".