28611851 has 2 divisors, whose sum is σ = 28611852. Its totient is φ = 28611850.

The previous prime is 28611823. The next prime is 28611857. The reversal of 28611851 is 15811682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28611851 - 2⁶ = 28611787 is a prime.

It is equal to p_1777118 and since 28611851 and 1777118 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28611857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14305925 + 14305926.

It is an arithmetic number, because the mean of its divisors is an integer number (14305926).

Almost surely, 2^28611851 is an apocalyptic number.

28611851 is a deficient number, since it is larger than the sum of its proper divisors (1).

28611851 is an equidigital number, since it uses as much as digits as its factorization.

28611851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 32.

The square root of 28611851 is about 5349.0046737688. The cubic root of 28611851 is about 305.8548124373.

The spelling of 28611851 in words is "twenty-eight million, six hundred eleven thousand, eight hundred fifty-one".