7776990 has 144 divisors (see below), whose sum is σ = 24137568. Its totient is φ = 1723392.

The previous prime is 7776983. The next prime is 7777009. The reversal of 7776990 is 996777.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 338119 + ... + 338141.

It is an arithmetic number, because the mean of its divisors is an integer number (167622).

Almost surely, 2^7776990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7776990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12068784).

7776990 is an abundant number, since it is smaller than the sum of its proper divisors (16360578).

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

7776990 is a wasteful number, since it uses less digits than its factorization.

7776990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 166698, while the sum is 45.

The square root of 7776990 is about 2788.7255153564. The cubic root of 7776990 is about 198.1240422620.

The spelling of 7776990 in words is "seven million, seven hundred seventy-six thousand, nine hundred ninety".