28394001 has 6 divisors (see below), whose sum is σ = 41013570. Its totient is φ = 18929328.

The previous prime is 28393993. The next prime is 28394027. The reversal of 28394001 is 10049382.

It can be written as a sum of positive squares in only one way, i.e., 18147600 + 10246401 = 4260^2 + 3201^2 .

It is not a de Polignac number, because 28394001 - 2³ = 28393993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28394501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1577436 + ... + 1577453.

It is an arithmetic number, because the mean of its divisors is an integer number (6835595).

Almost surely, 2^28394001 is an apocalyptic number.

It is an amenable number.

28394001 is a deficient number, since it is larger than the sum of its proper divisors (12619569).

28394001 is a wasteful number, since it uses less digits than its factorization.

28394001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154895 (or 3154892 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28394001 is about 5328.6021619183. The cubic root of 28394001 is about 305.0765766694.

The spelling of 28394001 in words is "twenty-eight million, three hundred ninety-four thousand, one".