72403902 has 32 divisors (see below), whose sum is σ = 161280000. Its totient is φ = 24077304.

The previous prime is 72403897. The next prime is 72403907. The reversal of 72403902 is 20930427.

It is an interprime number because it is at equal distance from previous prime (72403897) and next prime (72403907).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72403907) 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, 25603 + ... + 28289.

It is an arithmetic number, because the mean of its divisors is an integer number (5040000).

Almost surely, 2^72403902 is an apocalyptic number.

72403902 is an abundant number, since it is smaller than the sum of its proper divisors (88876098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72403902 is a wasteful number, since it uses less digits than its factorization.

72403902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197 (or 3191 counting only the distinct ones).

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

The square root of 72403902 is about 8509.0482429000. The cubic root of 72403902 is about 416.7932311693.

The spelling of 72403902 in words is "seventy-two million, four hundred three thousand, nine hundred two".