7638988 has 48 divisors (see below), whose sum is σ = 16369920. Its totient is φ = 3046464.

The previous prime is 7638979. The next prime is 7638991. The reversal of 7638988 is 8898367.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44070 + ... + 44242.

It is an arithmetic number, because the mean of its divisors is an integer number (341040).

Almost surely, 2^7638988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7638988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8184960).

7638988 is an abundant number, since it is smaller than the sum of its proper divisors (8730932).

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

7638988 is a wasteful number, since it uses less digits than its factorization.

7638988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 284 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The square root of 7638988 is about 2763.8719217793. The cubic root of 7638988 is about 196.9451434951.

The spelling of 7638988 in words is "seven million, six hundred thirty-eight thousand, nine hundred eighty-eight".