28733969 has 16 divisors (see below), whose sum is σ = 32987520. Its totient is φ = 24773760.

The previous prime is 28733963. The next prime is 28733977. The reversal of 28733969 is 96933782.

It is a de Polignac number, because none of the positive numbers 2^k-28733969 is a prime.

It is a super-2 number, since 2×28733969² = 1651281948985922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28733963) 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, 34247 + ... + 35075.

It is an arithmetic number, because the mean of its divisors is an integer number (2061720).

Almost surely, 2^28733969 is an apocalyptic number.

It is an amenable number.

28733969 is a deficient number, since it is larger than the sum of its proper divisors (4253551).

28733969 is a wasteful number, since it uses less digits than its factorization.

28733969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its digits is 489888, while the sum is 47.

The square root of 28733969 is about 5360.4075404767. The cubic root of 28733969 is about 306.2893336124.

The spelling of 28733969 in words is "twenty-eight million, seven hundred thirty-three thousand, nine hundred sixty-nine".