68490774 has 48 divisors (see below), whose sum is σ = 166280400. Its totient is φ = 20191680.

The previous prime is 68490767. The next prime is 68490781. The reversal of 68490774 is 47709486.

It is an interprime number because it is at equal distance from previous prime (68490767) and next prime (68490781).

It is a super-2 number, since 2×68490774² = 9381972246238152, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2652 + ... + 12000.

It is an arithmetic number, because the mean of its divisors is an integer number (3464175).

Almost surely, 2^68490774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68490774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83140200).

68490774 is an abundant number, since it is smaller than the sum of its proper divisors (97789626).

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

68490774 is a wasteful number, since it uses less digits than its factorization.

68490774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9405 (or 9402 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 68490774 is about 8275.9152968116. The cubic root of 68490774 is about 409.1451034735.

The spelling of 68490774 in words is "sixty-eight million, four hundred ninety thousand, seven hundred seventy-four".