68428878 has 16 divisors (see below), whose sum is σ = 156408960. Its totient is φ = 19551096.

The previous prime is 68428853. The next prime is 68428891. The reversal of 68428878 is 87882486.

It is a super-2 number, since 2×68428878² = 9365022688677768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68428878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814588 + ... + 814671.

It is an arithmetic number, because the mean of its divisors is an integer number (9775560).

Almost surely, 2^68428878 is an apocalyptic number.

68428878 is an abundant number, since it is smaller than the sum of its proper divisors (87980082).

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

68428878 is a wasteful number, since it uses less digits than its factorization.

68428878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629271.

The product of its digits is 1376256, while the sum is 51.

The square root of 68428878 is about 8272.1749256166. The cubic root of 68428878 is about 409.0218164167.

The spelling of 68428878 in words is "sixty-eight million, four hundred twenty-eight thousand, eight hundred seventy-eight".