25780746 has 32 divisors (see below), whose sum is σ = 54263808. Its totient is φ = 8149680.

The previous prime is 25780709. The next prime is 25780763. The reversal of 25780746 is 64708752.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16791 + ... + 18261.

It is an arithmetic number, because the mean of its divisors is an integer number (1695744).

Almost surely, 2^25780746 is an apocalyptic number.

25780746 is an abundant number, since it is smaller than the sum of its proper divisors (28483062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25780746 is a wasteful number, since it uses less digits than its factorization.

25780746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 25780746 is about 5077.4743721658. The cubic root of 25780746 is about 295.4145125634.

It can be divided in two parts, 257 and 80746, that added together give a triangular number (81003 = T₄₀₂).

The spelling of 25780746 in words is "twenty-five million, seven hundred eighty thousand, seven hundred forty-six".