25772478 has 8 divisors (see below), whose sum is σ = 51544968. Its totient is φ = 8590824.

The previous prime is 25772423. The next prime is 25772533. The reversal of 25772478 is 87427752.

It is an interprime number because it is at equal distance from previous prime (25772423) and next prime (25772533).

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

25772478 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2147701 + ... + 2147712.

It is an arithmetic number, because the mean of its divisors is an integer number (6443121).

Almost surely, 2^25772478 is an apocalyptic number.

25772478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25772478 is a wasteful number, since it uses less digits than its factorization.

25772478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295418.

The product of its digits is 219520, while the sum is 42.

The square root of 25772478 is about 5076.6601225609. The cubic root of 25772478 is about 295.3829289371.

The spelling of 25772478 in words is "twenty-five million, seven hundred seventy-two thousand, four hundred seventy-eight".