68407040 has 72 divisors (see below), whose sum is σ = 176503488. Its totient is φ = 25251840.

The previous prime is 68407033. The next prime is 68407057. The reversal of 68407040 is 4070486.

It is a junction number, because it is equal to n+sod(n) for n = 68406994 and 68407012.

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, 14585 + ... + 18695.

Almost surely, 2^68407040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68407040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88251744).

68407040 is an abundant number, since it is smaller than the sum of its proper divisors (108096448).

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

68407040 is a wasteful number, since it uses less digits than its factorization.

68407040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145 (or 4131 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 68407040 is about 8270.8548530367. The cubic root of 68407040 is about 408.9783008277.

The spelling of 68407040 in words is "sixty-eight million, four hundred seven thousand, forty".