67991260 has 12 divisors (see below), whose sum is σ = 142781688. Its totient is φ = 27196496.

The previous prime is 67991207. The next prime is 67991269. The reversal of 67991260 is 6219976.

It is a super-2 number, since 2×67991260² = 9245622872775200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67991269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1699762 + ... + 1699801.

It is an arithmetic number, because the mean of its divisors is an integer number (11898474).

Almost surely, 2^67991260 is an apocalyptic number.

It is an amenable number.

67991260 is an abundant number, since it is smaller than the sum of its proper divisors (74790428).

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

67991260 is a wasteful number, since it uses less digits than its factorization.

67991260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399572 (or 3399570 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 67991260 is about 8245.6812938653. The cubic root of 67991260 is about 408.1480223515.

The spelling of 67991260 in words is "sixty-seven million, nine hundred ninety-one thousand, two hundred sixty".