64974138 has 8 divisors (see below), whose sum is σ = 129948288. Its totient is φ = 21658044.

The previous prime is 64974127. The next prime is 64974139. The reversal of 64974138 is 83147946.

It is a sphenic number, since it is the product of 3 distinct primes.

64974138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 64974138.

It is not an unprimeable number, because it can be changed into a prime (64974139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5414506 + ... + 5414517.

It is an arithmetic number, because the mean of its divisors is an integer number (16243536).

Almost surely, 2^64974138 is an apocalyptic number.

64974138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64974138 is a wasteful number, since it uses less digits than its factorization.

64974138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10829028.

The product of its digits is 145152, while the sum is 42.

The square root of 64974138 is about 8060.6536955758. The cubic root of 64974138 is about 402.0192436520.

The spelling of 64974138 in words is "sixty-four million, nine hundred seventy-four thousand, one hundred thirty-eight".