25772544 has 240 divisors, whose sum is σ = 91922688. Its totient is φ = 6782976.

The previous prime is 25772543. The next prime is 25772567. The reversal of 25772544 is 44527752.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25772499 and 25772508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25772543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 548329 + ... + 548375.

Almost surely, 2^25772544 is an apocalyptic number.

25772544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25772544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45961344).

25772544 is an abundant number, since it is smaller than the sum of its proper divisors (66150144).

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

25772544 is a wasteful number, since it uses less digits than its factorization.

25772544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 76 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 25772544 is about 5076.6666228934. Note that the first 4 decimals coincide. The cubic root of 25772544 is about 295.3831810828.

The spelling of 25772544 in words is "twenty-five million, seven hundred seventy-two thousand, five hundred forty-four".