72740423 has 8 divisors (see below), whose sum is σ = 84303360. Its totient is φ = 61470360.

The previous prime is 72740413. The next prime is 72740429. The reversal of 72740423 is 32404727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72740423 - 2⁴ = 72740407 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 (72740429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72683 + ... + 73676.

It is an arithmetic number, because the mean of its divisors is an integer number (10537920).

Almost surely, 2^72740423 is an apocalyptic number.

72740423 is a deficient number, since it is larger than the sum of its proper divisors (11562937).

72740423 is a wasteful number, since it uses less digits than its factorization.

72740423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146437.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 72740423 is about 8528.7996224557. The cubic root of 72740423 is about 417.4379613078.

The spelling of 72740423 in words is "seventy-two million, seven hundred forty thousand, four hundred twenty-three".