28898831 has 12 divisors (see below), whose sum is σ = 31451112. Its totient is φ = 26541216.

The previous prime is 28898803. The next prime is 28898839. The reversal of 28898831 is 13889882.

It is not a de Polignac number, because 28898831 - 2²² = 24704527 is a prime.

It is a super-2 number, since 2×28898831² = 1670284866333122, 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 (28898839) 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, 51605 + ... + 52161.

It is an arithmetic number, because the mean of its divisors is an integer number (2620926).

Almost surely, 2^28898831 is an apocalyptic number.

28898831 is a deficient number, since it is larger than the sum of its proper divisors (2552281).

28898831 is a wasteful number, since it uses less digits than its factorization.

28898831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 877 counting only the distinct ones).

The product of its digits is 221184, while the sum is 47.

The square root of 28898831 is about 5375.7632946401. The cubic root of 28898831 is about 306.8739982380.

The spelling of 28898831 in words is "twenty-eight million, eight hundred ninety-eight thousand, eight hundred thirty-one".