801628591 has 16 divisors (see below), whose sum is σ = 887212224. Its totient is φ = 720428544.

The previous prime is 801628589. The next prime is 801628609. The reversal of 801628591 is 195826108.

It is a cyclic number.

It is not a de Polignac number, because 801628591 - 2¹ = 801628589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801628501) 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, 285205 + ... + 288001.

It is an arithmetic number, because the mean of its divisors is an integer number (55450764).

Almost surely, 2^801628591 is an apocalyptic number.

801628591 is a deficient number, since it is larger than the sum of its proper divisors (85583633).

801628591 is a wasteful number, since it uses less digits than its factorization.

801628591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 801628591 is about 28313.0463037802. The cubic root of 801628591 is about 928.9472772260.

The spelling of 801628591 in words is "eight hundred one million, six hundred twenty-eight thousand, five hundred ninety-one".