28903995 has 24 divisors (see below), whose sum is σ = 53048736. Its totient is φ = 14508288.

The previous prime is 28903991. The next prime is 28904009. The reversal of 28903995 is 59930982.

It is not a de Polignac number, because 28903995 - 2² = 28903991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28903995.

It is not an unprimeable number, because it can be changed into a prime (28903991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18127 + ... + 19656.

It is an arithmetic number, because the mean of its divisors is an integer number (2210364).

Almost surely, 2^28903995 is an apocalyptic number.

28903995 is a deficient number, since it is larger than the sum of its proper divisors (24144741).

28903995 is a wasteful number, since it uses less digits than its factorization.

28903995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37811 (or 37808 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 28903995 is about 5376.2435770713. The cubic root of 28903995 is about 306.8922758279.

The spelling of 28903995 in words is "twenty-eight million, nine hundred three thousand, nine hundred ninety-five".