72200146 has 4 divisors (see below), whose sum is σ = 108300222. Its totient is φ = 36100072.

The previous prime is 72200143. The next prime is 72200159. The reversal of 72200146 is 64100227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 59675625 + 12524521 = 7725^2 + 3539^2 .

It is a super-2 number, since 2×72200146² = 10425722164842632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (72200143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18050035 + ... + 18050038.

Almost surely, 2^72200146 is an apocalyptic number.

72200146 is a deficient number, since it is larger than the sum of its proper divisors (36100076).

72200146 is a wasteful number, since it uses less digits than its factorization.

72200146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36100075.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 72200146 is about 8497.0669057034. The cubic root of 72200146 is about 416.4018898772.

The spelling of 72200146 in words is "seventy-two million, two hundred thousand, one hundred forty-six".