72522450 has 432 divisors, whose sum is σ = 277857216. Its totient is φ = 13305600.

The previous prime is 72522433. The next prime is 72522469. The reversal of 72522450 is 5422527.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 3153139 + ... + 3153161.

It is an arithmetic number, because the mean of its divisors is an integer number (643188).

Almost surely, 2^72522450 is an apocalyptic number.

72522450 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 72522450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138928608).

72522450 is an abundant number, since it is smaller than the sum of its proper divisors (205334766).

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

72522450 is a wasteful number, since it uses less digits than its factorization.

72522450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 72522450 is about 8516.0113903165. The cubic root of 72522450 is about 417.0205810797.

Adding to 72522450 its reverse (5422527), we get a palindrome (77944977).

The spelling of 72522450 in words is "seventy-two million, five hundred twenty-two thousand, four hundred fifty".