72230178 has 16 divisors (see below), whose sum is σ = 152958240. Its totient is φ = 22660416.

The previous prime is 72230141. The next prime is 72230201. The reversal of 72230178 is 87103227.

It is a super-2 number, since 2×72230178² = 10434397227823368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353968 + ... + 354171.

It is an arithmetic number, because the mean of its divisors is an integer number (9559890).

Almost surely, 2^72230178 is an apocalyptic number.

72230178 is an abundant number, since it is smaller than the sum of its proper divisors (80728062).

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

72230178 is a wasteful number, since it uses less digits than its factorization.

72230178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708161.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 72230178 is about 8498.8339200151. The cubic root of 72230178 is about 416.4596166675.

The spelling of 72230178 in words is "seventy-two million, two hundred thirty thousand, one hundred seventy-eight".