8432644 has 24 divisors (see below), whose sum is σ = 16476768. Its totient is φ = 3743040.

The previous prime is 8432623. The next prime is 8432647. The reversal of 8432644 is 4462348.

It is a super-2 number, since 2×8432644² = 142218969661472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8432647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337 + ... + 4120.

It is an arithmetic number, because the mean of its divisors is an integer number (686532).

Almost surely, 2^8432644 is an apocalyptic number.

It is an amenable number.

8432644 is a deficient number, since it is larger than the sum of its proper divisors (8044124).

8432644 is a wasteful number, since it uses less digits than its factorization.

8432644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4515 (or 4513 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 8432644 is about 2903.9015134815. The cubic root of 8432644 is about 203.5422583069.

The spelling of 8432644 in words is "eight million, four hundred thirty-two thousand, six hundred forty-four".