28733507 has 6 divisors (see below), whose sum is σ = 31583244. Its totient is φ = 26121260.

The previous prime is 28733489. The next prime is 28733513. The reversal of 28733507 is 70533782.

It is not a de Polignac number, because 28733507 - 2⁶ = 28733443 is a prime.

It is a super-2 number, since 2×28733507² = 1651228849038098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28733557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118613 + ... + 118854.

It is an arithmetic number, because the mean of its divisors is an integer number (5263874).

Almost surely, 2^28733507 is an apocalyptic number.

28733507 is a deficient number, since it is larger than the sum of its proper divisors (2849737).

28733507 is a wasteful number, since it uses less digits than its factorization.

28733507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237489 (or 237478 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 28733507 is about 5360.3644465652. The cubic root of 28733507 is about 306.2876920428.

The spelling of 28733507 in words is "twenty-eight million, seven hundred thirty-three thousand, five hundred seven".