72400623 has 8 divisors (see below), whose sum is σ = 96827136. Its totient is φ = 48120600.

The previous prime is 72400591. The next prime is 72400639. The reversal of 72400623 is 32600427.

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

It is not a de Polignac number, because 72400623 - 2⁵ = 72400591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72400593 and 72400602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72400663) 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, 35463 + ... + 37448.

It is an arithmetic number, because the mean of its divisors is an integer number (12103392).

Almost surely, 2^72400623 is an apocalyptic number.

72400623 is a deficient number, since it is larger than the sum of its proper divisors (24426513).

72400623 is a wasteful number, since it uses less digits than its factorization.

72400623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73245.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 72400623 is about 8508.8555634703. The cubic root of 72400623 is about 416.7869392173.

The spelling of 72400623 in words is "seventy-two million, four hundred thousand, six hundred twenty-three".