40000068 has 30 divisors (see below), whose sum is σ = 104568926. Its totient is φ = 13333248.

The previous prime is 40000061. The next prime is 40000123. The reversal of 40000068 is 86000004.

It can be written as a sum of positive squares in only one way, i.e., 39917124 + 82944 = 6318^2 + 288^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 40000068.

It is not an unprimeable number, because it can be changed into a prime (40000061) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 61405 + ... + 62052.

Almost surely, 2^40000068 is an apocalyptic number.

It is an amenable number.

40000068 is an abundant number, since it is smaller than the sum of its proper divisors (64568858).

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

40000068 is a wasteful number, since it uses less digits than its factorization.

40000068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123473 (or 123462 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 40000068 is about 6324.5606962065. The cubic root of 40000068 is about 341.9953831325.

The spelling of 40000068 in words is "forty million, sixty-eight", and thus it is an aban number and an uban number.