72023418 has 20 divisors (see below), whose sum is σ = 161386170. Its totient is φ = 24007752.

The previous prime is 72023387. The next prime is 72023437. The reversal of 72023418 is 81432027.

It can be written as a sum of positive squares in only one way, i.e., 69006249 + 3017169 = 8307^2 + 1737^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 72023391 and 72023400.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 222133 + ... + 222456.

Almost surely, 2^72023418 is an apocalyptic number.

72023418 is an abundant number, since it is smaller than the sum of its proper divisors (89362752).

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

72023418 is a wasteful number, since it uses less digits than its factorization.

72023418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444603 (or 444594 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 72023418 is about 8486.6611809356. The cubic root of 72023418 is about 416.0618628722.

The spelling of 72023418 in words is "seventy-two million, twenty-three thousand, four hundred eighteen".