72198705 has 16 divisors (see below), whose sum is σ = 115660224. Its totient is φ = 38458560.

The previous prime is 72198701. The next prime is 72198733. The reversal of 72198705 is 50789127.

It is not a de Polignac number, because 72198705 - 2² = 72198701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72198701) 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, 12087 + ... + 17043.

It is an arithmetic number, because the mean of its divisors is an integer number (7228764).

Almost surely, 2^72198705 is an apocalyptic number.

It is an amenable number.

72198705 is a deficient number, since it is larger than the sum of its proper divisors (43461519).

72198705 is a wasteful number, since it uses less digits than its factorization.

72198705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5936.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 72198705 is about 8496.9821113146. The cubic root of 72198705 is about 416.3991196191.

The spelling of 72198705 in words is "seventy-two million, one hundred ninety-eight thousand, seven hundred five".