25734978 has 12 divisors (see below), whose sum is σ = 55759158. Its totient is φ = 8578320.

The previous prime is 25734971. The next prime is 25734983. The reversal of 25734978 is 87943752.

25734978 is a `hidden beast` number, since 2 + 573 + 4 + 9 + 78 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25371369 + 363609 = 5037^2 + 603^2 .

It is not an unprimeable number, because it can be changed into a prime (25734971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 714843 + ... + 714878.

Almost surely, 2^25734978 is an apocalyptic number.

25734978 is an abundant number, since it is smaller than the sum of its proper divisors (30024180).

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

25734978 is a wasteful number, since it uses less digits than its factorization.

25734978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429729 (or 1429726 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 25734978 is about 5072.9654049678. The cubic root of 25734978 is about 295.2395946846.

The spelling of 25734978 in words is "twenty-five million, seven hundred thirty-four thousand, nine hundred seventy-eight".