72902403 has 32 divisors (see below), whose sum is σ = 123840000. Its totient is φ = 41521248.

The previous prime is 72902393. The next prime is 72902407. The reversal of 72902403 is 30420927.

It is not a de Polignac number, because 72902403 - 2⁶ = 72902339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (72902407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93925 + ... + 94697.

It is an arithmetic number, because the mean of its divisors is an integer number (3870000).

Almost surely, 2^72902403 is an apocalyptic number.

72902403 is a deficient number, since it is larger than the sum of its proper divisors (50937597).

72902403 is a wasteful number, since it uses less digits than its factorization.

72902403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1282 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 72902403 is about 8538.2904026509. The cubic root of 72902403 is about 417.7475849903.

The spelling of 72902403 in words is "seventy-two million, nine hundred two thousand, four hundred three".