25890406 has 4 divisors (see below), whose sum is σ = 38835612. Its totient is φ = 12945202.

The previous prime is 25890401. The next prime is 25890409. The reversal of 25890406 is 60409852.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25890401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6472600 + ... + 6472603.

It is an arithmetic number, because the mean of its divisors is an integer number (9708903).

Almost surely, 2^25890406 is an apocalyptic number.

25890406 is a deficient number, since it is larger than the sum of its proper divisors (12945206).

25890406 is a wasteful number, since it uses less digits than its factorization.

25890406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12945205.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 25890406 is about 5088.2615891874. The cubic root of 25890406 is about 295.8327747306.

The spelling of 25890406 in words is "twenty-five million, eight hundred ninety thousand, four hundred six".