28451539 has 2 divisors, whose sum is σ = 28451540. Its totient is φ = 28451538.

The previous prime is 28451519. The next prime is 28451567. The reversal of 28451539 is 93515482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28451539 - 2⁷ = 28451411 is a prime.

It is a super-4 number, since 4×28451539⁴ (a number of 31 digits) contains 4444 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28451498 and 28451507.

It is not a weakly prime, because it can be changed into another prime (28451519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14225769 + 14225770.

It is an arithmetic number, because the mean of its divisors is an integer number (14225770).

Almost surely, 2^28451539 is an apocalyptic number.

28451539 is a deficient number, since it is larger than the sum of its proper divisors (1).

28451539 is an equidigital number, since it uses as much as digits as its factorization.

28451539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 37.

The square root of 28451539 is about 5333.9984064490. The cubic root of 28451539 is about 305.2825081091.

The spelling of 28451539 in words is "twenty-eight million, four hundred fifty-one thousand, five hundred thirty-nine".