7728623 has 12 divisors (see below), whose sum is σ = 9212112. Its totient is φ = 6461280.

The previous prime is 7728613. The next prime is 7728631. The reversal of 7728623 is 3268277.

It is not a de Polignac number, because 7728623 - 2⁸ = 7728367 is a prime.

It is a super-2 number, since 2×7728623² = 119463226952258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7728613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86 + ... + 3932.

It is an arithmetic number, because the mean of its divisors is an integer number (767676).

Almost surely, 2^7728623 is an apocalyptic number.

7728623 is a deficient number, since it is larger than the sum of its proper divisors (1483489).

7728623 is a wasteful number, since it uses less digits than its factorization.

7728623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902 (or 3895 counting only the distinct ones).

The product of its digits is 28224, while the sum is 35.

The square root of 7728623 is about 2780.0401076243. The cubic root of 7728623 is about 197.7124605694.

The spelling of 7728623 in words is "seven million, seven hundred twenty-eight thousand, six hundred twenty-three".