64387674 has 24 divisors (see below), whose sum is σ = 150238452. Its totient is φ = 19811520.

The previous prime is 64387663. The next prime is 64387709. The reversal of 64387674 is 47678346.

It can be written as a sum of positive squares in 2 ways, for example, as 64112049 + 275625 = 8007^2 + 525^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137347 + ... + 137814.

Almost surely, 2^64387674 is an apocalyptic number.

64387674 is an abundant number, since it is smaller than the sum of its proper divisors (85850778).

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

64387674 is a wasteful number, since it uses less digits than its factorization.

64387674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275182 (or 275179 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 64387674 is about 8024.1930435403. The cubic root of 64387674 is about 400.8060288694.

The spelling of 64387674 in words is "sixty-four million, three hundred eighty-seven thousand, six hundred seventy-four".