72392397 has 16 divisors (see below), whose sum is σ = 120340992. Its totient is φ = 37606320.

The previous prime is 72392393. The next prime is 72392399. The reversal of 72392397 is 79329327.

It is not a de Polignac number, because 72392397 - 2² = 72392393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72392393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156463 + ... + 156924.

It is an arithmetic number, because the mean of its divisors is an integer number (7521312).

Almost surely, 2^72392397 is an apocalyptic number.

72392397 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

72392397 is a deficient number, since it is larger than the sum of its proper divisors (47948595).

72392397 is a wasteful number, since it uses less digits than its factorization.

72392397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313408.

The product of its digits is 142884, while the sum is 42.

The square root of 72392397 is about 8508.3721709855. The cubic root of 72392397 is about 416.7711538134.

The spelling of 72392397 in words is "seventy-two million, three hundred ninety-two thousand, three hundred ninety-seven".