72204615 has 40 divisors (see below), whose sum is σ = 147929760. Its totient is φ = 33006528.

The previous prime is 72204607. The next prime is 72204619. The reversal of 72204615 is 51640227.

It is not a de Polignac number, because 72204615 - 2³ = 72204607 is a prime.

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 (72204619) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9900 + ... + 15569.

It is an arithmetic number, because the mean of its divisors is an integer number (3698244).

Almost surely, 2^72204615 is an apocalyptic number.

72204615 is an abundant number, since it is smaller than the sum of its proper divisors (75725145).

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

72204615 is a wasteful number, since it uses less digits than its factorization.

72204615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25493 (or 25484 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 72204615 is about 8497.3298747312. The cubic root of 72204615 is about 416.4104810955.

The spelling of 72204615 in words is "seventy-two million, two hundred four thousand, six hundred fifteen".