28980711 has 12 divisors (see below), whose sum is σ = 42031080. Its totient is φ = 19242000.

The previous prime is 28980703. The next prime is 28980739. The reversal of 28980711 is 11708982.

It is not a de Polignac number, because 28980711 - 2³ = 28980703 is a prime.

It is a super-2 number, since 2×28980711² = 1679763220131042, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28980701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4156 + ... + 8673.

It is an arithmetic number, because the mean of its divisors is an integer number (3502590).

Almost surely, 2^28980711 is an apocalyptic number.

28980711 is a deficient number, since it is larger than the sum of its proper divisors (13050369).

28980711 is a wasteful number, since it uses less digits than its factorization.

28980711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13086 (or 13083 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 28980711 is about 5383.3735705411. The cubic root of 28980711 is about 307.1635503120.

The spelling of 28980711 in words is "twenty-eight million, nine hundred eighty thousand, seven hundred eleven".