28999107 has 8 divisors (see below), whose sum is σ = 42961680. Its totient is φ = 19332720.

The previous prime is 28999081. The next prime is 28999129. The reversal of 28999107 is 70199982.

It is not a de Polignac number, because 28999107 - 2⁷ = 28998979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28999147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536994 + ... + 537047.

It is an arithmetic number, because the mean of its divisors is an integer number (5370210).

Almost surely, 2^28999107 is an apocalyptic number.

28999107 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28999107 is a deficient number, since it is larger than the sum of its proper divisors (13962573).

28999107 is a wasteful number, since it uses less digits than its factorization.

28999107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074050 (or 1074044 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 28999107 is about 5385.0818935277. The cubic root of 28999107 is about 307.2285289972.

The spelling of 28999107 in words is "twenty-eight million, nine hundred ninety-nine thousand, one hundred seven".