25742736 has 60 divisors (see below), whose sum is σ = 73424988. Its totient is φ = 8416512.

The previous prime is 25742729. The next prime is 25742737. The reversal of 25742736 is 63724752.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23040000 + 2702736 = 4800^2 + 1644^2 .

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

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 25742736.

It is not an unprimeable number, because it can be changed into a prime (25742737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5946 + ... + 9318.

Almost surely, 2^25742736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25742736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36712494).

25742736 is an abundant number, since it is smaller than the sum of its proper divisors (47682252).

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

25742736 is a wasteful number, since it uses less digits than its factorization.

25742736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440 (or 3431 counting only the distinct ones).

The product of its digits is 70560, while the sum is 36.

The square root of 25742736 is about 5073.7299888741. The cubic root of 25742736 is about 295.2692590925.

The spelling of 25742736 in words is "twenty-five million, seven hundred forty-two thousand, seven hundred thirty-six".