28979895 has 16 divisors (see below), whose sum is σ = 52992000. Its totient is φ = 13247904.

The previous prime is 28979861. The next prime is 28979897. The reversal of 28979895 is 59897982.

It is not a de Polignac number, because 28979895 - 2⁶ = 28979831 is a prime.

It is a super-2 number, since 2×28979895² = 1679668628422050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28979897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137895 + ... + 138104.

It is an arithmetic number, because the mean of its divisors is an integer number (3312000).

Almost surely, 2^28979895 is an apocalyptic number.

28979895 is a deficient number, since it is larger than the sum of its proper divisors (24012105).

28979895 is a wasteful number, since it uses less digits than its factorization.

28979895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276014.

The product of its digits is 3265920, while the sum is 57.

The square root of 28979895 is about 5383.2977811004. The cubic root of 28979895 is about 307.1606673852.

The spelling of 28979895 in words is "twenty-eight million, nine hundred seventy-nine thousand, eight hundred ninety-five".