28949995 has 4 divisors (see below), whose sum is σ = 34740000. Its totient is φ = 23159992.

The previous prime is 28949971. The next prime is 28950007. The reversal of 28949995 is 59994982.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28949995 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894995 + ... + 2895004.

It is an arithmetic number, because the mean of its divisors is an integer number (8685000).

Almost surely, 2^28949995 is an apocalyptic number.

28949995 is a deficient number, since it is larger than the sum of its proper divisors (5790005).

28949995 is an equidigital number, since it uses as much as digits as its factorization.

28949995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5790004.

The product of its digits is 2099520, while the sum is 55.

The square root of 28949995 is about 5380.5199562868. The cubic root of 28949995 is about 307.0549933845.

The spelling of 28949995 in words is "twenty-eight million, nine hundred forty-nine thousand, nine hundred ninety-five".