28801641 has 16 divisors (see below), whose sum is σ = 42013440. Its totient is φ = 17405520.

The previous prime is 28801627. The next prime is 28801649. The reversal of 28801641 is 14610882.

It is not a de Polignac number, because 28801641 - 2¹³ = 28793449 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28801599 and 28801608.

It is not an unprimeable number, because it can be changed into a prime (28801649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12786 + ... + 14868.

It is an arithmetic number, because the mean of its divisors is an integer number (2625840).

Almost surely, 2^28801641 is an apocalyptic number.

It is an amenable number.

28801641 is a deficient number, since it is larger than the sum of its proper divisors (13211799).

28801641 is a wasteful number, since it uses less digits than its factorization.

28801641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28801641 is about 5366.7160349696. The cubic root of 28801641 is about 306.5295946699.

The spelling of 28801641 in words is "twenty-eight million, eight hundred one thousand, six hundred forty-one".