28662947 has 2 divisors, whose sum is σ = 28662948. Its totient is φ = 28662946.

The previous prime is 28662929. The next prime is 28662973. The reversal of 28662947 is 74926682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28662947 - 2⁶ = 28662883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28662898 and 28662907.

It is not a weakly prime, because it can be changed into another prime (28662917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14331473 + 14331474.

It is an arithmetic number, because the mean of its divisors is an integer number (14331474).

Almost surely, 2^28662947 is an apocalyptic number.

28662947 is a deficient number, since it is larger than the sum of its proper divisors (1).

28662947 is an equidigital number, since it uses as much as digits as its factorization.

28662947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 28662947 is about 5353.7787589702. The cubic root of 28662947 is about 306.0367727462.

The spelling of 28662947 in words is "twenty-eight million, six hundred sixty-two thousand, nine hundred forty-seven".