72455427 has 24 divisors (see below), whose sum is σ = 118113840. Its totient is φ = 42396480.

The previous prime is 72455423. The next prime is 72455437.

It is a happy number.

72455427 is a `hidden beast` number, since 72 + 45 + 542 + 7 = 666.

72455427 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 72455427 - 2² = 72455423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72455391 and 72455400.

It is not an unprimeable number, because it can be changed into a prime (72455423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9748 + ... + 15489.

It is an arithmetic number, because the mean of its divisors is an integer number (4921410).

Almost surely, 2^72455427 is an apocalyptic number.

72455427 is a deficient number, since it is larger than the sum of its proper divisors (45658413).

72455427 is a wasteful number, since it uses less digits than its factorization.

72455427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25283 (or 25280 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 72455427 is about 8512.0753638581. The cubic root of 72455427 is about 416.8920756537.

The spelling of 72455427 in words is "seventy-two million, four hundred fifty-five thousand, four hundred twenty-seven".