68461992 has 48 divisors (see below), whose sum is σ = 196328340. Its totient is φ = 21477888.

The previous prime is 68461949. The next prime is 68461999. The reversal of 68461992 is 29916486.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68459076 + 2916 = 8274^2 + 54^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (68461999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26743 + ... + 29190.

Almost surely, 2^68461992 is an apocalyptic number.

It is an amenable number.

68461992 is an abundant number, since it is smaller than the sum of its proper divisors (127866348).

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

68461992 is a wasteful number, since it uses less digits than its factorization.

68461992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55962 (or 55955 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 68461992 is about 8274.1762127719. The cubic root of 68461992 is about 409.0877835182.

The spelling of 68461992 in words is "sixty-eight million, four hundred sixty-one thousand, nine hundred ninety-two".