72320250 has 64 divisors (see below), whose sum is σ = 181763712. Its totient is φ = 19152000.

The previous prime is 72320239. The next prime is 72320267. The reversal of 72320250 is 5202327.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158022 + ... + 158478.

It is an arithmetic number, because the mean of its divisors is an integer number (2840058).

Almost surely, 2^72320250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72320250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90881856).

72320250 is an abundant number, since it is smaller than the sum of its proper divisors (109443462).

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

72320250 is a wasteful number, since it uses less digits than its factorization.

72320250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 72320250 is about 8504.1313489386. The cubic root of 72320250 is about 416.6326550015.

Adding to 72320250 its reverse (5202327), we get a palindrome (77522577).

The spelling of 72320250 in words is "seventy-two million, three hundred twenty thousand, two hundred fifty".