864640454 has 4 divisors (see below), whose sum is σ = 1296960684. Its totient is φ = 432320226.

The previous prime is 864640453. The next prime is 864640477. The reversal of 864640454 is 454046468.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×864640454² = 1495206229386652232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864640453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216160112 + ... + 216160115.

It is an arithmetic number, because the mean of its divisors is an integer number (324240171).

Almost surely, 2^864640454 is an apocalyptic number.

864640454 is a deficient number, since it is larger than the sum of its proper divisors (432320230).

864640454 is a wasteful number, since it uses less digits than its factorization.

864640454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432320229.

The product of its (nonzero) digits is 368640, while the sum is 41.

The square root of 864640454 is about 29404.7692390197. The cubic root of 864640454 is about 952.6759104060.

The spelling of 864640454 in words is "eight hundred sixty-four million, six hundred forty thousand, four hundred fifty-four".