28572437 has 2 divisors, whose sum is σ = 28572438. Its totient is φ = 28572436.

The previous prime is 28572413. The next prime is 28572443. The reversal of 28572437 is 73427582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22648081 + 5924356 = 4759^2 + 2434^2 .

It is a cyclic number.

It is not a de Polignac number, because 28572437 - 2²⁰ = 27523861 is a prime.

It is a super-2 number, since 2×28572437² = 1632768312237938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28572437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28572407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14286218 + 14286219.

It is an arithmetic number, because the mean of its divisors is an integer number (14286219).

Almost surely, 2^28572437 is an apocalyptic number.

It is an amenable number.

28572437 is a deficient number, since it is larger than the sum of its proper divisors (1).

28572437 is an equidigital number, since it uses as much as digits as its factorization.

28572437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 38.

The square root of 28572437 is about 5345.3191672715. The cubic root of 28572437 is about 305.7143053771.

The spelling of 28572437 in words is "twenty-eight million, five hundred seventy-two thousand, four hundred thirty-seven".