28292971 has 8 divisors (see below), whose sum is σ = 32465664. Its totient is φ = 24153000.

The previous prime is 28292969. The next prime is 28292977. The reversal of 28292971 is 17929282.

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 28292971 - 2¹ = 28292969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28292977) 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, 6295 + ... + 9808.

It is an arithmetic number, because the mean of its divisors is an integer number (4058208).

Almost surely, 2^28292971 is an apocalyptic number.

28292971 is a deficient number, since it is larger than the sum of its proper divisors (4172693).

28292971 is a wasteful number, since it uses less digits than its factorization.

28292971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16361.

The product of its digits is 36288, while the sum is 40.

The square root of 28292971 is about 5319.1137419687. The cubic root of 28292971 is about 304.7143110012.

The spelling of 28292971 in words is "twenty-eight million, two hundred ninety-two thousand, nine hundred seventy-one".