64403895 has 32 divisors (see below), whose sum is σ = 108877824. Its totient is φ = 32457600.

The previous prime is 64403893. The next prime is 64403897. The reversal of 64403895 is 59830446.

It is an interprime number because it is at equal distance from previous prime (64403893) and next prime (64403897).

It is not a de Polignac number, because 64403895 - 2¹ = 64403893 is a prime.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64403893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18385 + ... + 21605.

It is an arithmetic number, because the mean of its divisors is an integer number (3402432).

Almost surely, 2^64403895 is an apocalyptic number.

64403895 is a deficient number, since it is larger than the sum of its proper divisors (44473929).

64403895 is a wasteful number, since it uses less digits than its factorization.

64403895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 64403895 is about 8025.2037357316. The cubic root of 64403895 is about 400.8396840102.

The spelling of 64403895 in words is "sixty-four million, four hundred three thousand, eight hundred ninety-five".