28978001 has 8 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 26126352.

The previous prime is 28977943. The next prime is 28978003. The reversal of 28978001 is 10087982.

It is a happy number.

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 28978001 - 2⁶ = 28977937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28978003) 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 7 ways as a sum of consecutive naturals, for example, 25361 + ... + 26478.

It is an arithmetic number, because the mean of its divisors is an integer number (3991680).

Almost surely, 2^28978001 is an apocalyptic number.

It is an amenable number.

28978001 is a deficient number, since it is larger than the sum of its proper divisors (2955439).

28978001 is a wasteful number, since it uses less digits than its factorization.

28978001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51895.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 28978001 is about 5383.1218637516. The cubic root of 28978001 is about 307.1539756772.

The spelling of 28978001 in words is "twenty-eight million, nine hundred seventy-eight thousand, one".