25768906 has 8 divisors (see below), whose sum is σ = 40927140. Its totient is φ = 12126528.

The previous prime is 25768903. The next prime is 25768943. The reversal of 25768906 is 60986752.

25768906 = 249² + 250² + ... + 452².

It can be written as a sum of positive squares in 2 ways, for example, as 24591681 + 1177225 = 4959^2 + 1085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (25768903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378921 + ... + 378988.

Almost surely, 2^25768906 is an apocalyptic number.

25768906 is a deficient number, since it is larger than the sum of its proper divisors (15158234).

25768906 is a wasteful number, since it uses less digits than its factorization.

25768906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757928.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 25768906 is about 5076.3083042699. The cubic root of 25768906 is about 295.3692818653.

The spelling of 25768906 in words is "twenty-five million, seven hundred sixty-eight thousand, nine hundred six".