7788990 has 32 divisors (see below), whose sum is σ = 20393856. Its totient is φ = 1888160.

The previous prime is 7788983. The next prime is 7788997. The reversal of 7788990 is 998877.

It is an interprime number because it is at equal distance from previous prime (7788983) and next prime (7788997).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7788997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11472 + ... + 12131.

It is an arithmetic number, because the mean of its divisors is an integer number (637308).

Almost surely, 2^7788990 is an apocalyptic number.

7788990 is an abundant number, since it is smaller than the sum of its proper divisors (12604866).

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

7788990 is a wasteful number, since it uses less digits than its factorization.

7788990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23624.

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 7788990 is about 2790.8762064986. The cubic root of 7788990 is about 198.2258925804.

It can be divided in two parts, 7788 and 990, that added together give a palindrome (8778).

The spelling of 7788990 in words is "seven million, seven hundred eighty-eight thousand, nine hundred ninety".