72798545 has 8 divisors (see below), whose sum is σ = 87915624. Its totient is φ = 57867264.

The previous prime is 72798533. The next prime is 72798547. The reversal of 72798545 is 54589727.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5837056 + 66961489 = 2416^2 + 8183^2 .

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 72798545 - 2¹⁰ = 72797521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72798545.

It is not an unprimeable number, because it can be changed into a prime (72798547) 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, 45584 + ... + 47153.

It is an arithmetic number, because the mean of its divisors is an integer number (10989453).

Almost surely, 2^72798545 is an apocalyptic number.

It is an amenable number.

72798545 is a deficient number, since it is larger than the sum of its proper divisors (15117079).

72798545 is a wasteful number, since it uses less digits than its factorization.

72798545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92899.

The product of its digits is 705600, while the sum is 47.

The square root of 72798545 is about 8532.2063383395. The cubic root of 72798545 is about 417.5491139467.

The spelling of 72798545 in words is "seventy-two million, seven hundred ninety-eight thousand, five hundred forty-five".