28501667 has 2 divisors, whose sum is σ = 28501668. Its totient is φ = 28501666.

The previous prime is 28501663. The next prime is 28501709. The reversal of 28501667 is 76610582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28501667 - 2² = 28501663 is a prime.

It is not a weakly prime, because it can be changed into another prime (28501663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14250833 + 14250834.

It is an arithmetic number, because the mean of its divisors is an integer number (14250834).

Almost surely, 2^28501667 is an apocalyptic number.

28501667 is a deficient number, since it is larger than the sum of its proper divisors (1).

28501667 is an equidigital number, since it uses as much as digits as its factorization.

28501667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28501667 is about 5338.6952525875. The cubic root of 28501667 is about 305.4616925921.

The spelling of 28501667 in words is "twenty-eight million, five hundred one thousand, six hundred sixty-seven".