72402789 has 8 divisors (see below), whose sum is σ = 97759360. Its totient is φ = 47657376.

The previous prime is 72402773. The next prime is 72402793. The reversal of 72402789 is 98720427.

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

It is not a de Polignac number, because 72402789 - 2⁴ = 72402773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72402709) 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, 152512 + ... + 152985.

It is an arithmetic number, because the mean of its divisors is an integer number (12219920).

Almost surely, 2^72402789 is an apocalyptic number.

72402789 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

72402789 is a deficient number, since it is larger than the sum of its proper divisors (25356571).

72402789 is a wasteful number, since it uses less digits than its factorization.

72402789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305579.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 72402789 is about 8508.9828416797. The cubic root of 72402789 is about 416.7910954960.

The spelling of 72402789 in words is "seventy-two million, four hundred two thousand, seven hundred eighty-nine".