28649401 has 8 divisors (see below), whose sum is σ = 31721184. Its totient is φ = 25655520.

The previous prime is 28649393. The next prime is 28649407. The reversal of 28649401 is 10494682.

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

It is not a de Polignac number, because 28649401 - 2³ = 28649393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28649407) 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, 18700 + ... + 20173.

It is an arithmetic number, because the mean of its divisors is an integer number (3965148).

Almost surely, 2^28649401 is an apocalyptic number.

It is an amenable number.

28649401 is a deficient number, since it is larger than the sum of its proper divisors (3071783).

28649401 is a wasteful number, since it uses less digits than its factorization.

28649401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38951.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28649401 is about 5352.5135217017. The cubic root of 28649401 is about 305.9885545436.

The spelling of 28649401 in words is "twenty-eight million, six hundred forty-nine thousand, four hundred one".