72070198 has 4 divisors (see below), whose sum is σ = 108105300. Its totient is φ = 36035098.

The previous prime is 72070181. The next prime is 72070213. The reversal of 72070198 is 89107027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89107027 = 6949 ⋅12823.

It is a super-2 number, since 2×72070198² = 10388226879518408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18017548 + ... + 18017551.

It is an arithmetic number, because the mean of its divisors is an integer number (27026325).

Almost surely, 2^72070198 is an apocalyptic number.

72070198 is a deficient number, since it is larger than the sum of its proper divisors (36035102).

72070198 is a wasteful number, since it uses less digits than its factorization.

72070198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36035101.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 72070198 is about 8489.4168233160. The cubic root of 72070198 is about 416.1519222914.

It can be divided in two parts, 7207019 and 8, that added together give a palindrome (7207027).

The spelling of 72070198 in words is "seventy-two million, seventy thousand, one hundred ninety-eight".