68837840 has 40 divisors (see below), whose sum is σ = 163778208. Its totient is φ = 26893440.

The previous prime is 68837819. The next prime is 68837843. The reversal of 68837840 is 4873886.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 68837791 and 68837800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68837843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6566 + ... + 13445.

Almost surely, 2^68837840 is an apocalyptic number.

It is an amenable number.

68837840 is an abundant number, since it is smaller than the sum of its proper divisors (94940368).

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

68837840 is a wasteful number, since it uses less digits than its factorization.

68837840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20067 (or 20061 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 68837840 is about 8296.8572363275. The cubic root of 68837840 is about 409.8350317879.

The spelling of 68837840 in words is "sixty-eight million, eight hundred thirty-seven thousand, eight hundred forty".