28693747 has 2 divisors, whose sum is σ = 28693748. Its totient is φ = 28693746.

The previous prime is 28693741. The next prime is 28693757. The reversal of 28693747 is 74739682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28693747 - 2⁷ = 28693619 is a prime.

It is a super-2 number, since 2×28693747² = 1646662233800018, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28693697 and 28693706.

It is not a weakly prime, because it can be changed into another prime (28693741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14346873 + 14346874.

It is an arithmetic number, because the mean of its divisors is an integer number (14346874).

Almost surely, 2^28693747 is an apocalyptic number.

28693747 is a deficient number, since it is larger than the sum of its proper divisors (1).

28693747 is an equidigital number, since it uses as much as digits as its factorization.

28693747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 28693747 is about 5356.6544596418. The cubic root of 28693747 is about 306.1463515970.

The spelling of 28693747 in words is "twenty-eight million, six hundred ninety-three thousand, seven hundred forty-seven".