72399868 has 6 divisors (see below), whose sum is σ = 126699776. Its totient is φ = 36199932.

The previous prime is 72399841. The next prime is 72399869. The reversal of 72399868 is 86899327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72399869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9049980 + ... + 9049987.

Almost surely, 2^72399868 is an apocalyptic number.

It is an amenable number.

72399868 is a deficient number, since it is larger than the sum of its proper divisors (54299908).

72399868 is a wasteful number, since it uses less digits than its factorization.

72399868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18099971 (or 18099969 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 52.

The square root of 72399868 is about 8508.8111978114. The cubic root of 72399868 is about 416.7854904487.

The spelling of 72399868 in words is "seventy-two million, three hundred ninety-nine thousand, eight hundred sixty-eight".