7388864 has 28 divisors (see below), whose sum is σ = 16757904. Its totient is φ = 3166464.

The previous prime is 7388861. The next prime is 7388873. The reversal of 7388864 is 4688837.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×7388864² = 109190622420992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7388861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7799 + ... + 8694.

Almost surely, 2^7388864 is an apocalyptic number.

It is an amenable number.

7388864 is an abundant number, since it is smaller than the sum of its proper divisors (9369040).

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

7388864 is a wasteful number, since it uses less digits than its factorization.

7388864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16512 (or 16502 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 7388864 is about 2718.2464936058. The cubic root of 7388864 is about 194.7717161999.

The spelling of 7388864 in words is "seven million, three hundred eighty-eight thousand, eight hundred sixty-four".