28670401 has 8 divisors (see below), whose sum is σ = 29377440. Its totient is φ = 27970848.

The previous prime is 28670399. The next prime is 28670413. The reversal of 28670401 is 10407682.

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 28670401 - 2¹ = 28670399 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 28670401.

It is not an unprimeable number, because it can be changed into a prime (28670101) 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, 6310 + ... + 9856.

It is an arithmetic number, because the mean of its divisors is an integer number (3672180).

Almost surely, 2^28670401 is an apocalyptic number.

It is an amenable number.

28670401 is a deficient number, since it is larger than the sum of its proper divisors (707039).

28670401 is a wasteful number, since it uses less digits than its factorization.

28670401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28670401 is about 5354.4748575374. The cubic root of 28670401 is about 306.0632994485.

The spelling of 28670401 in words is "twenty-eight million, six hundred seventy thousand, four hundred one".