28932861 has 16 divisors (see below), whose sum is σ = 40955328. Its totient is φ = 18105600.

The previous prime is 28932769. The next prime is 28932863. The reversal of 28932861 is 16823982.

It is a happy number.

It is not a de Polignac number, because 28932861 - 2⁷ = 28932733 is a prime.

It is a super-2 number, since 2×28932861² = 1674220891290642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28932863) 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, 34831 + ... + 35651.

It is an arithmetic number, because the mean of its divisors is an integer number (2559708).

Almost surely, 2^28932861 is an apocalyptic number.

It is an amenable number.

28932861 is a deficient number, since it is larger than the sum of its proper divisors (12022467).

28932861 is a wasteful number, since it uses less digits than its factorization.

28932861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532.

The product of its digits is 41472, while the sum is 39.

The square root of 28932861 is about 5378.9274953284. The cubic root of 28932861 is about 306.9944047900.

The spelling of 28932861 in words is "twenty-eight million, nine hundred thirty-two thousand, eight hundred sixty-one".