68493240 has 96 divisors (see below), whose sum is σ = 226324800. Its totient is φ = 17959680.

The previous prime is 68493197. The next prime is 68493263. The reversal of 68493240 is 4239486.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 68493195 and 68493204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20401 + ... + 23519.

It is an arithmetic number, because the mean of its divisors is an integer number (2357550).

Almost surely, 2^68493240 is an apocalyptic number.

68493240 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 68493240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113162400).

68493240 is an abundant number, since it is smaller than the sum of its proper divisors (157831560).

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

68493240 is a wasteful number, since it uses less digits than its factorization.

68493240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197 (or 3190 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 68493240 is about 8276.0642820123. The cubic root of 68493240 is about 409.1500138171.

The spelling of 68493240 in words is "sixty-eight million, four hundred ninety-three thousand, two hundred forty".