72775389 has 8 divisors (see below), whose sum is σ = 98124480. Its totient is φ = 47971616.

The previous prime is 72775387. The next prime is 72775397. The reversal of 72775389 is 98357727.

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 72775389 - 2¹ = 72775387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72775387) 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, 136017 + ... + 136550.

It is an arithmetic number, because the mean of its divisors is an integer number (12265560).

Almost surely, 2^72775389 is an apocalyptic number.

It is an amenable number.

72775389 is a deficient number, since it is larger than the sum of its proper divisors (25349091).

72775389 is a wasteful number, since it uses less digits than its factorization.

72775389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272659.

The product of its digits is 740880, while the sum is 48.

The square root of 72775389 is about 8530.8492543240. The cubic root of 72775389 is about 417.5048374546.

The spelling of 72775389 in words is "seventy-two million, seven hundred seventy-five thousand, three hundred eighty-nine".