28880733 has 16 divisors (see below), whose sum is σ = 44104320. Its totient is φ = 16467456.

The previous prime is 28880729. The next prime is 28880737. The reversal of 28880733 is 33708882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28880729) and next prime (28880737).

It is not a de Polignac number, because 28880733 - 2² = 28880729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28880691 and 28880700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28880737) 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, 10741 + ... + 13157.

It is an arithmetic number, because the mean of its divisors is an integer number (2756520).

Almost surely, 2^28880733 is an apocalyptic number.

It is an amenable number.

28880733 is a deficient number, since it is larger than the sum of its proper divisors (15223587).

28880733 is a wasteful number, since it uses less digits than its factorization.

28880733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 28880733 is about 5374.0797351733. The cubic root of 28880733 is about 306.8099245345.

The spelling of 28880733 in words is "twenty-eight million, eight hundred eighty thousand, seven hundred thirty-three".