25991434 has 16 divisors (see below), whose sum is σ = 44668800. Its totient is φ = 11111184.

The previous prime is 25991401. The next prime is 25991437. The reversal of 25991434 is 43419952.

It is a junction number, because it is equal to n+sod(n) for n = 25991393 and 25991402.

It is not an unprimeable number, because it can be changed into a prime (25991437) 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, 4032 + ... + 8260.

It is an arithmetic number, because the mean of its divisors is an integer number (2791800).

Almost surely, 2^25991434 is an apocalyptic number.

25991434 is a deficient number, since it is larger than the sum of its proper divisors (18677366).

25991434 is a wasteful number, since it uses less digits than its factorization.

25991434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4677.

The product of its digits is 38880, while the sum is 37.

The square root of 25991434 is about 5098.1794789905. The cubic root of 25991434 is about 296.2170689834.

The spelling of 25991434 in words is "twenty-five million, nine hundred ninety-one thousand, four hundred thirty-four".