68992990 has 48 divisors (see below), whose sum is σ = 143735760. Its totient is φ = 23760000.

The previous prime is 68992961. The next prime is 68993017. The reversal of 68992990 is 9929986.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21490 + ... + 24490.

It is an arithmetic number, because the mean of its divisors is an integer number (2994495).

Almost surely, 2^68992990 is an apocalyptic number.

68992990 is an abundant number, since it is smaller than the sum of its proper divisors (74742770).

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

68992990 is a wasteful number, since it uses less digits than its factorization.

68992990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049 (or 3038 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 68992990 is about 8306.2018997855. The cubic root of 68992990 is about 410.1427026558.

It can be divided in two parts, 6899 and 2990, that added together give a palindrome (9889).

The spelling of 68992990 in words is "sixty-eight million, nine hundred ninety-two thousand, nine hundred ninety".