68492880 has 120 divisors (see below), whose sum is σ = 231547680. Its totient is φ = 18144000.

The previous prime is 68492869. The next prime is 68492909. The reversal of 68492880 is 8829486.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×68492880² = 9382549221388800, which contains 22 as substring.

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

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, 180531 + ... + 180909.

It is an arithmetic number, because the mean of its divisors is an integer number (1929564).

Almost surely, 2^68492880 is an apocalyptic number.

68492880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68492880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115773840).

68492880 is an abundant number, since it is smaller than the sum of its proper divisors (163054800).

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

68492880 is a wasteful number, since it uses less digits than its factorization.

68492880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 68492880 is about 8276.0425325152. The cubic root of 68492880 is about 409.1492969860.

The spelling of 68492880 in words is "sixty-eight million, four hundred ninety-two thousand, eight hundred eighty".