28999151 has 4 divisors (see below), whose sum is σ = 29028792. Its totient is φ = 28969512.

The previous prime is 28999147. The next prime is 28999163. The reversal of 28999151 is 15199982.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28999151 - 2² = 28999147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28999181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13301 + ... + 15326.

It is an arithmetic number, because the mean of its divisors is an integer number (7257198).

Almost surely, 2^28999151 is an apocalyptic number.

28999151 is a deficient number, since it is larger than the sum of its proper divisors (29641).

28999151 is a wasteful number, since it uses less digits than its factorization.

28999151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29640.

The product of its digits is 58320, while the sum is 44.

The square root of 28999151 is about 5385.0859788865. The cubic root of 28999151 is about 307.2286843819.

The spelling of 28999151 in words is "twenty-eight million, nine hundred ninety-nine thousand, one hundred fifty-one".