68511940 has 48 divisors (see below), whose sum is σ = 171585792. Its totient is φ = 22467456.

The previous prime is 68511931. The next prime is 68512001. The reversal of 68511940 is 4911586.

It is a junction number, because it is equal to n+sod(n) for n = 68511896 and 68511905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7419 + ... + 13858.

It is an arithmetic number, because the mean of its divisors is an integer number (3574704).

Almost surely, 2^68511940 is an apocalyptic number.

It is an amenable number.

68511940 is an abundant number, since it is smaller than the sum of its proper divisors (103073852).

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

68511940 is a wasteful number, since it uses less digits than its factorization.

68511940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21316 (or 21314 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 68511940 is about 8277.1939689728. The cubic root of 68511940 is about 409.1872457594.

The spelling of 68511940 in words is "sixty-eight million, five hundred eleven thousand, nine hundred forty".