68922990 has 48 divisors (see below), whose sum is σ = 180232416. Its totient is φ = 18273600.

The previous prime is 68922983. The next prime is 68922991. The reversal of 68922990 is 9922986.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68922991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14175 + ... + 18405.

It is an arithmetic number, because the mean of its divisors is an integer number (3754842).

Almost surely, 2^68922990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68922990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90116208).

68922990 is an abundant number, since it is smaller than the sum of its proper divisors (111309426).

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

68922990 is a wasteful number, since it uses less digits than its factorization.

68922990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425 (or 4422 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 68922990 is about 8301.9871115294. The cubic root of 68922990 is about 410.0039460259.

The spelling of 68922990 in words is "sixty-eight million, nine hundred twenty-two thousand, nine hundred ninety".