28903749 has 32 divisors (see below), whose sum is σ = 47063040. Its totient is φ = 15422400.

The previous prime is 28903741. The next prime is 28903751. The reversal of 28903749 is 94730982.

It is not a de Polignac number, because 28903749 - 2³ = 28903741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28903749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28903741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18114 + ... + 19644.

It is an arithmetic number, because the mean of its divisors is an integer number (1470720).

Almost surely, 2^28903749 is an apocalyptic number.

28903749 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28903749 is a deficient number, since it is larger than the sum of its proper divisors (18159291).

28903749 is a wasteful number, since it uses less digits than its factorization.

28903749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 28903749 is about 5376.2206985949. The cubic root of 28903749 is about 306.8914051788.

The spelling of 28903749 in words is "twenty-eight million, nine hundred three thousand, seven hundred forty-nine".