28899491 has 2 divisors, whose sum is σ = 28899492. Its totient is φ = 28899490.

The previous prime is 28899487. The next prime is 28899503. The reversal of 28899491 is 19499882.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28899491 - 2² = 28899487 is a prime.

It is not a weakly prime, because it can be changed into another prime (28899401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14449745 + 14449746.

It is an arithmetic number, because the mean of its divisors is an integer number (14449746).

Almost surely, 2^28899491 is an apocalyptic number.

28899491 is a deficient number, since it is larger than the sum of its proper divisors (1).

28899491 is an equidigital number, since it uses as much as digits as its factorization.

28899491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 50.

The square root of 28899491 is about 5375.8246809211. The cubic root of 28899491 is about 306.8763343797.

The spelling of 28899491 in words is "twenty-eight million, eight hundred ninety-nine thousand, four hundred ninety-one".