68981400 has 144 divisors (see below), whose sum is σ = 243976200. Its totient is φ = 17418240.

The previous prime is 68981389. The next prime is 68981449. The reversal of 68981400 is 418986.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 33192 + ... + 35208.

Almost surely, 2^68981400 is an apocalyptic number.

68981400 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 68981400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121988100).

68981400 is an abundant number, since it is smaller than the sum of its proper divisors (174994800).

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

68981400 is a wasteful number, since it uses less digits than its factorization.

68981400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058 (or 2046 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 68981400 is about 8305.5041990237. The cubic root of 68981400 is about 410.1197350078.

The spelling of 68981400 in words is "sixty-eight million, nine hundred eighty-one thousand, four hundred".