72047412 has 36 divisors (see below), whose sum is σ = 183142596. Its totient is φ = 23880960.

The previous prime is 72047389. The next prime is 72047419. The reversal of 72047412 is 21474027.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5363856 + 66683556 = 2316^2 + 8166^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72047419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 988 + ... + 12044.

Almost surely, 2^72047412 is an apocalyptic number.

It is an amenable number.

72047412 is an abundant number, since it is smaller than the sum of its proper divisors (111095184).

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

72047412 is a wasteful number, since it uses less digits than its factorization.

72047412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11248 (or 11243 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 72047412 is about 8488.0746933566. The cubic root of 72047412 is about 416.1080602538.

The spelling of 72047412 in words is "seventy-two million, forty-seven thousand, four hundred twelve".