68621190 has 64 divisors (see below), whose sum is σ = 187494912. Its totient is φ = 15910400.

The previous prime is 68621177. The next prime is 68621219. The reversal of 68621190 is 9112686.

It is a super-2 number, since 2×68621190² = 9417735434032200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3070 + ... + 12110.

It is an arithmetic number, because the mean of its divisors is an integer number (2929608).

Almost surely, 2^68621190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68621190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93747456).

68621190 is an abundant number, since it is smaller than the sum of its proper divisors (118873722).

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

68621190 is a wasteful number, since it uses less digits than its factorization.

68621190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9085.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 68621190 is about 8283.7907989036. The cubic root of 68621190 is about 409.4046286269.

The spelling of 68621190 in words is "sixty-eight million, six hundred twenty-one thousand, one hundred ninety".