7689990 has 64 divisors (see below), whose sum is σ = 23016960. Its totient is φ = 1597440.

The previous prime is 7689973. The next prime is 7690013. The reversal of 7689990 is 999867.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 646 + ... + 3974.

It is an arithmetic number, because the mean of its divisors is an integer number (359640).

Almost surely, 2^7689990 is an apocalyptic number.

7689990 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7689990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11508480).

7689990 is an abundant number, since it is smaller than the sum of its proper divisors (15326970).

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

7689990 is a wasteful number, since it uses less digits than its factorization.

7689990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 7689990 is about 2773.0831217257. The cubic root of 7689990 is about 197.3824756120.

The spelling of 7689990 in words is "seven million, six hundred eighty-nine thousand, nine hundred ninety".