28969907 has 8 divisors (see below), whose sum is σ = 29721600. Its totient is φ = 28223944.

The previous prime is 28969901. The next prime is 28969909. The reversal of 28969907 is 70996982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28969907 - 2⁴ = 28969891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28969901) 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, 9944 + ... + 12522.

It is an arithmetic number, because the mean of its divisors is an integer number (3715200).

Almost surely, 2^28969907 is an apocalyptic number.

28969907 is a deficient number, since it is larger than the sum of its proper divisors (751693).

28969907 is a wasteful number, since it uses less digits than its factorization.

28969907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 28969907 is about 5382.3700170092. The cubic root of 28969907 is about 307.1253754092.

The spelling of 28969907 in words is "twenty-eight million, nine hundred sixty-nine thousand, nine hundred seven".