64144368 has 30 divisors (see below), whose sum is σ = 179515544. Its totient is φ = 21381408.

The previous prime is 64144343. The next prime is 64144397. The reversal of 64144368 is 86344146.

64144368 is a `hidden beast` number, since 641 + 4 + 4 + 3 + 6 + 8 = 666.

It is a super-2 number, since 2×64144368² = 8228999892238848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222580 + ... + 222867.

Almost surely, 2^64144368 is an apocalyptic number.

It is an amenable number.

64144368 is an abundant number, since it is smaller than the sum of its proper divisors (115371176).

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

64144368 is a wasteful number, since it uses less digits than its factorization.

64144368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445461 (or 445452 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 64144368 is about 8009.0179173229. The cubic root of 64144368 is about 400.3005407982.

The spelling of 64144368 in words is "sixty-four million, one hundred forty-four thousand, three hundred sixty-eight".