68490884 has 48 divisors (see below), whose sum is σ = 151710720. Its totient is φ = 26278560.

The previous prime is 68490871. The next prime is 68490889. The reversal of 68490884 is 48809486.

It is a super-2 number, since 2×68490884² = 9382002382202912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68490889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18977 + ... + 22295.

It is an arithmetic number, because the mean of its divisors is an integer number (3160640).

Almost surely, 2^68490884 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 68490884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75855360).

68490884 is an abundant number, since it is smaller than the sum of its proper divisors (83219836).

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

68490884 is a wasteful number, since it uses less digits than its factorization.

68490884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408 (or 3406 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 68490884 is about 8275.9219425995. The cubic root of 68490884 is about 409.1453225100.

The spelling of 68490884 in words is "sixty-eight million, four hundred ninety thousand, eight hundred eighty-four".