28902743 has 18 divisors (see below), whose sum is σ = 32378904. Its totient is φ = 25747128.

The previous prime is 28902739. The next prime is 28902749. The reversal of 28902743 is 34720982.

It is not a de Polignac number, because 28902743 - 2² = 28902739 is a prime.

It is a super-3 number, since 3×28902743³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28902749) 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 17 ways as a sum of consecutive naturals, for example, 489848 + ... + 489906.

It is an arithmetic number, because the mean of its divisors is an integer number (1798828).

Almost surely, 2^28902743 is an apocalyptic number.

28902743 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28902743 is a deficient number, since it is larger than the sum of its proper divisors (3476161).

28902743 is an equidigital number, since it uses as much as digits as its factorization.

28902743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 28902743 is about 5376.1271376336. The cubic root of 28902743 is about 306.8878446679.

The spelling of 28902743 in words is "twenty-eight million, nine hundred two thousand, seven hundred forty-three".