28651601 has 8 divisors (see below), whose sum is σ = 32901600. Its totient is φ = 24675840.

The previous prime is 28651589. The next prime is 28651619. The reversal of 28651601 is 10615682.

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 28651601 - 2²² = 24457297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28651621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68336 + ... + 68753.

It is an arithmetic number, because the mean of its divisors is an integer number (4112700).

Almost surely, 2^28651601 is an apocalyptic number.

It is an amenable number.

28651601 is a deficient number, since it is larger than the sum of its proper divisors (4249999).

28651601 is a wasteful number, since it uses less digits than its factorization.

28651601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137119.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 28651601 is about 5352.7190286807. The cubic root of 28651601 is about 305.9963866747.

The spelling of 28651601 in words is "twenty-eight million, six hundred fifty-one thousand, six hundred one".