72022100 has 18 divisors (see below), whose sum is σ = 156288174. Its totient is φ = 28808800.

The previous prime is 72022079. The next prime is 72022123. The reversal of 72022100 is 122027.

It can be written as a sum of positive squares in 3 ways, for example, as 8213956 + 63808144 = 2866^2 + 7988^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360011 + ... + 360210.

Almost surely, 2^72022100 is an apocalyptic number.

It is an amenable number.

72022100 is an abundant number, since it is smaller than the sum of its proper divisors (84266074).

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

72022100 is a wasteful number, since it uses less digits than its factorization.

72022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720235 (or 720228 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 72022100 is about 8486.5835293126. The cubic root of 72022100 is about 416.0593249344.

Adding to 72022100 its reverse (122027), we get a palindrome (72144127).

The spelling of 72022100 in words is "seventy-two million, twenty-two thousand, one hundred".