68040684 has 18 divisors (see below), whose sum is σ = 171991820. Its totient is φ = 22680216.

The previous prime is 68040673. The next prime is 68040719. The reversal of 68040684 is 48604086.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1890019 = 68040684 / (6 + 8 + 0 + 4 + 0 + 6 + 8 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 944974 + ... + 945045.

Almost surely, 2^68040684 is an apocalyptic number.

It is an amenable number.

68040684 is an abundant number, since it is smaller than the sum of its proper divisors (103951136).

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

68040684 is a wasteful number, since it uses less digits than its factorization.

68040684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890029 (or 1890024 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 68040684 is about 8248.6777122155. The cubic root of 68040684 is about 408.2468949711.

The spelling of 68040684 in words is "sixty-eight million, forty thousand, six hundred eighty-four".