72378565 has 16 divisors (see below), whose sum is σ = 99412992. Its totient is φ = 49555584.

The previous prime is 72378563. The next prime is 72378599. The reversal of 72378565 is 56587327.

It is a cyclic number.

It is not a de Polignac number, because 72378565 - 2¹ = 72378563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72378563) 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, 31692 + ... + 33898.

It is an arithmetic number, because the mean of its divisors is an integer number (6213312).

Almost surely, 2^72378565 is an apocalyptic number.

It is an amenable number.

72378565 is a deficient number, since it is larger than the sum of its proper divisors (27034427).

72378565 is a wasteful number, since it uses less digits than its factorization.

72378565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156.

The product of its digits is 352800, while the sum is 43.

The square root of 72378565 is about 8507.5592857176. The cubic root of 72378565 is about 416.7446079972.

The spelling of 72378565 in words is "seventy-two million, three hundred seventy-eight thousand, five hundred sixty-five".