64140294 has 16 divisors (see below), whose sum is σ = 129480768. Its totient is φ = 21180072.

The previous prime is 64140233. The next prime is 64140301. The reversal of 64140294 is 49204146.

64140294 = T₁₀₄₁ + T₁₀₄₂ + ... + T₁₁₄₇.

It is a super-2 number, since 2×64140294² = 8227954628812872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49312 + ... + 50595.

It is an arithmetic number, because the mean of its divisors is an integer number (8092548).

Almost surely, 2^64140294 is an apocalyptic number.

64140294 is an abundant number, since it is smaller than the sum of its proper divisors (65340474).

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

64140294 is a wasteful number, since it uses less digits than its factorization.

64140294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100019.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 64140294 is about 8008.7635749846. The cubic root of 64140294 is about 400.2920658586.

The spelling of 64140294 in words is "sixty-four million, one hundred forty thousand, two hundred ninety-four".