4320891 has 8 divisors (see below), whose sum is σ = 6401360. Its totient is φ = 2880576.

The previous prime is 4320863. The next prime is 4320893. The reversal of 4320891 is 1980234.

It is not a de Polignac number, because 4320891 - 2¹³ = 4312699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 160033 = 4320891 / (4 + 3 + 2 + 0 + 8 + 9 + 1).

It is a Duffinian number.

4320891 is a modest number, since divided by 891 gives 432 as remainder.

It is not an unprimeable number, because it can be changed into a prime (4320893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79990 + ... + 80043.

It is an arithmetic number, because the mean of its divisors is an integer number (800170).

Almost surely, 2^4320891 is an apocalyptic number.

4320891 is a deficient number, since it is larger than the sum of its proper divisors (2080469).

4320891 is a wasteful number, since it uses less digits than its factorization.

4320891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160042 (or 160036 counting only the distinct ones).

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

The square root of 4320891 is about 2078.6752993193. The cubic root of 4320891 is about 162.8762531987.

The spelling of 4320891 in words is "four million, three hundred twenty thousand, eight hundred ninety-one".