72370399 has 16 divisors (see below), whose sum is σ = 78336000. Its totient is φ = 66699360.

The previous prime is 72370391. The next prime is 72370421. The reversal of 72370399 is 99307327.

It is a cyclic number.

It is not a de Polignac number, because 72370399 - 2³ = 72370391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72370391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70512 + ... + 71530.

It is an arithmetic number, because the mean of its divisors is an integer number (4896000).

Almost surely, 2^72370399 is an apocalyptic number.

72370399 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

72370399 is a deficient number, since it is larger than the sum of its proper divisors (5965601).

72370399 is a wasteful number, since it uses less digits than its factorization.

72370399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 72370399 is about 8507.0793460506. The cubic root of 72370399 is about 416.7289345518.

The spelling of 72370399 in words is "seventy-two million, three hundred seventy thousand, three hundred ninety-nine".