68982390 has 24 divisors (see below), whose sum is σ = 179354448. Its totient is φ = 18395280.

The previous prime is 68982343. The next prime is 68982401. The reversal of 68982390 is 9328986.

It is a super-2 number, since 2×68982390² = 9517140260224200, which contains 22 as substring.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 383146 + ... + 383325.

It is an arithmetic number, because the mean of its divisors is an integer number (7473102).

Almost surely, 2^68982390 is an apocalyptic number.

68982390 is an abundant number, since it is smaller than the sum of its proper divisors (110372058).

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

68982390 is a wasteful number, since it uses less digits than its factorization.

68982390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766484 (or 766481 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 68982390 is about 8305.5637978406. The cubic root of 68982390 is about 410.1216969695.

The spelling of 68982390 in words is "sixty-eight million, nine hundred eighty-two thousand, three hundred ninety".