72237258 has 40 divisors (see below), whose sum is σ = 163569252. Its totient is φ = 23825664.

The previous prime is 72237241. The next prime is 72237293. The reversal of 72237258 is 85273227.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66634569 + 5602689 = 8163^2 + 2367^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13416 + ... + 18012.

Almost surely, 2^72237258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72237258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81784626).

72237258 is an abundant number, since it is smaller than the sum of its proper divisors (91331994).

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

72237258 is a wasteful number, since it uses less digits than its factorization.

72237258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708 (or 4699 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 72237258 is about 8499.2504375386. The cubic root of 72237258 is about 416.4732233429.

The spelling of 72237258 in words is "seventy-two million, two hundred thirty-seven thousand, two hundred fifty-eight".