67998744 has 64 divisors (see below), whose sum is σ = 206064000. Its totient is φ = 20604960.

The previous prime is 67998737. The next prime is 67998751. The reversal of 67998744 is 44789976.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (67998737) and next prime (67998751).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 11934 + ... + 16685.

It is an arithmetic number, because the mean of its divisors is an integer number (3219750).

Almost surely, 2^67998744 is an apocalyptic number.

It is an amenable number.

67998744 is an abundant number, since it is smaller than the sum of its proper divisors (138065256).

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

67998744 is a wasteful number, since it uses less digits than its factorization.

67998744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28645 (or 28635 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 67998744 is about 8246.1350946974. The cubic root of 67998744 is about 408.1629971572.

The spelling of 67998744 in words is "sixty-seven million, nine hundred ninety-eight thousand, seven hundred forty-four".