64974190 has 16 divisors (see below), whose sum is σ = 117046800. Its totient is φ = 25968960.

The previous prime is 64974139. The next prime is 64974191. The reversal of 64974190 is 9147946.

It is a happy number.

It is a super-2 number, since 2×64974190² = 8443290732312200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64974191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19786 + ... + 22834.

It is an arithmetic number, because the mean of its divisors is an integer number (7315425).

Almost surely, 2^64974190 is an apocalyptic number.

64974190 is a deficient number, since it is larger than the sum of its proper divisors (52072610).

64974190 is a wasteful number, since it uses less digits than its factorization.

64974190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5187.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 64974190 is about 8060.6569211200. The cubic root of 64974190 is about 402.0193508997.

The spelling of 64974190 in words is "sixty-four million, nine hundred seventy-four thousand, one hundred ninety".