72454212 has 36 divisors (see below), whose sum is σ = 183799980. Its totient is φ = 24065472.

The previous prime is 72454199. The next prime is 72454229. The reversal of 72454212 is 21245427.

It can be written as a sum of positive squares in 2 ways, for example, as 32080896 + 40373316 = 5664^2 + 6354^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×72454212² = 10499225673081888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7114 + ... + 13982.

It is an arithmetic number, because the mean of its divisors is an integer number (5105555).

Almost surely, 2^72454212 is an apocalyptic number.

It is an amenable number.

72454212 is an abundant number, since it is smaller than the sum of its proper divisors (111345768).

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

72454212 is a wasteful number, since it uses less digits than its factorization.

72454212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7172 (or 7167 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 72454212 is about 8512.0039943600. The cubic root of 72454212 is about 416.8897453626.

Adding to 72454212 its reverse (21245427), we get a palindrome (93699639).

The spelling of 72454212 in words is "seventy-two million, four hundred fifty-four thousand, two hundred twelve".