64987398 has 24 divisors (see below), whose sum is σ = 160921488. Its totient is φ = 18567792.

The previous prime is 64987369. The next prime is 64987399. The reversal of 64987398 is 89378946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64987399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257761 + ... + 258012.

It is an arithmetic number, because the mean of its divisors is an integer number (6705062).

Almost surely, 2^64987398 is an apocalyptic number.

64987398 is an abundant number, since it is smaller than the sum of its proper divisors (95934090).

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

64987398 is a wasteful number, since it uses less digits than its factorization.

64987398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515788 (or 515785 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 64987398 is about 8061.4761675514. The cubic root of 64987398 is about 402.0465899815.

The spelling of 64987398 in words is "sixty-four million, nine hundred eighty-seven thousand, three hundred ninety-eight".