28650401 has 12 divisors (see below), whose sum is σ = 31692672. Its totient is φ = 25876656.

The previous prime is 28650397. The next prime is 28650403. The reversal of 28650401 is 10405682.

It is not a de Polignac number, because 28650401 - 2² = 28650397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28650403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6140 + ... + 9746.

It is an arithmetic number, because the mean of its divisors is an integer number (2641056).

Almost surely, 2^28650401 is an apocalyptic number.

It is an amenable number.

28650401 is a deficient number, since it is larger than the sum of its proper divisors (3042271).

28650401 is a wasteful number, since it uses less digits than its factorization.

28650401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680 (or 3667 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 28650401 is about 5352.6069349430. The cubic root of 28650401 is about 305.9921146529.

The spelling of 28650401 in words is "twenty-eight million, six hundred fifty thousand, four hundred one".