72403403 has 8 divisors (see below), whose sum is σ = 72930000. Its totient is φ = 71879328.

The previous prime is 72403399. The next prime is 72403411. The reversal of 72403403 is 30430427.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72403403 - 2² = 72403399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72403603) 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, 144848 + ... + 145346.

It is an arithmetic number, because the mean of its divisors is an integer number (9116250).

Almost surely, 2^72403403 is an apocalyptic number.

72403403 is a deficient number, since it is larger than the sum of its proper divisors (526597).

72403403 is a wasteful number, since it uses less digits than its factorization.

72403403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 72403403 is about 8509.0189211213. The cubic root of 72403403 is about 416.7922736689.

The spelling of 72403403 in words is "seventy-two million, four hundred three thousand, four hundred three".