7440864 has 24 divisors (see below), whose sum is σ = 19532520. Its totient is φ = 2480256.

The previous prime is 7440863. The next prime is 7440869. The reversal of 7440864 is 4680447.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7440863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38659 + ... + 38850.

It is an arithmetic number, because the mean of its divisors is an integer number (813855).

Almost surely, 2^7440864 is an apocalyptic number.

It is an amenable number.

7440864 is an abundant number, since it is smaller than the sum of its proper divisors (12091656).

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

7440864 is a wasteful number, since it uses less digits than its factorization.

7440864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77522 (or 77514 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 7440864 is about 2727.7947136836. The cubic root of 7440864 is about 195.2275581445.

The spelling of 7440864 in words is "seven million, four hundred forty thousand, eight hundred sixty-four".