28402697 has 8 divisors (see below), whose sum is σ = 28684032. Its totient is φ = 28123200.

The previous prime is 28402691. The next prime is 28402771. The reversal of 28402697 is 79620482.

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 28402697 - 2⁴ = 28402681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28402697.

It is not an unprimeable number, because it can be changed into a prime (28402691) 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, 84113 + ... + 84449.

It is an arithmetic number, because the mean of its divisors is an integer number (3585504).

Almost surely, 2^28402697 is an apocalyptic number.

It is an amenable number.

28402697 is a deficient number, since it is larger than the sum of its proper divisors (281335).

28402697 is a wasteful number, since it uses less digits than its factorization.

28402697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 28402697 is about 5329.4180732984. The cubic root of 28402697 is about 305.1077179320.

The spelling of 28402697 in words is "twenty-eight million, four hundred two thousand, six hundred ninety-seven".