72180789 has 8 divisors (see below), whose sum is σ = 98479392. Its totient is φ = 47001360.

The previous prime is 72180769. The next prime is 72180811. The reversal of 72180789 is 98708127.

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

It is not a de Polignac number, because 72180789 - 2⁸ = 72180533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72180789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72180769) 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, 279642 + ... + 279899.

It is an arithmetic number, because the mean of its divisors is an integer number (12309924).

Almost surely, 2^72180789 is an apocalyptic number.

It is an amenable number.

72180789 is a deficient number, since it is larger than the sum of its proper divisors (26298603).

72180789 is a wasteful number, since it uses less digits than its factorization.

72180789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559587.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 72180789 is about 8495.9277892411. The cubic root of 72180789 is about 416.3646738314.

The spelling of 72180789 in words is "seventy-two million, one hundred eighty thousand, seven hundred eighty-nine".