72446427 has 8 divisors (see below), whose sum is σ = 107328080. Its totient is φ = 48297600.

The previous prime is 72446419. The next prime is 72446453. The reversal of 72446427 is 72464427.

It is a happy number.

72446427 is a `hidden beast` number, since 7 + 2 + 4 + 4 + 642 + 7 = 666.

It is not a de Polignac number, because 72446427 - 2³ = 72446419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72446391 and 72446400.

It is not an unprimeable number, because it can be changed into a prime (72446417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341574 + ... + 1341627.

It is an arithmetic number, because the mean of its divisors is an integer number (13416010).

Almost surely, 2^72446427 is an apocalyptic number.

72446427 is a deficient number, since it is larger than the sum of its proper divisors (34881653).

72446427 is a wasteful number, since it uses less digits than its factorization.

72446427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683210 (or 2683204 counting only the distinct ones).

The product of its digits is 75264, while the sum is 36.

The square root of 72446427 is about 8511.5466867074. The cubic root of 72446427 is about 416.8748136201.

The spelling of 72446427 in words is "seventy-two million, four hundred forty-six thousand, four hundred twenty-seven".