28980511 has 12 divisors (see below), whose sum is σ = 33984768. Its totient is φ = 24639552.

The previous prime is 28980463. The next prime is 28980517. The reversal of 28980511 is 11508982.

It is not a de Polignac number, because 28980511 - 2⁷ = 28980383 is a prime.

It is a super-2 number, since 2×28980511² = 1679740035642242, which contains 22 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 (28980517) 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, 3895 + ... + 8551.

It is an arithmetic number, because the mean of its divisors is an integer number (2832064).

Almost surely, 2^28980511 is an apocalyptic number.

28980511 is a deficient number, since it is larger than the sum of its proper divisors (5004257).

28980511 is a wasteful number, since it uses less digits than its factorization.

28980511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4798 (or 4791 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 28980511 is about 5383.3549947965. The cubic root of 28980511 is about 307.1628437173.

The spelling of 28980511 in words is "twenty-eight million, nine hundred eighty thousand, five hundred eleven".