25016040 has 160 divisors (see below), whose sum is σ = 96180480. Its totient is φ = 5712768.

The previous prime is 25016029. The next prime is 25016071. The reversal of 25016040 is 4061052.

25016040 = 416² + 417² + ... + 527².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 22129 + ... + 23231.

It is an arithmetic number, because the mean of its divisors is an integer number (601128).

Almost surely, 2^25016040 is an apocalyptic number.

25016040 is a gapful number since it is divisible by the number (20) 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 25016040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48090240).

25016040 is an abundant number, since it is smaller than the sum of its proper divisors (71164440).

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

25016040 is a wasteful number, since it uses less digits than its factorization.

25016040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 25016040 is about 5001.6037428009. The cubic root of 25016040 is about 292.4642954446.

Adding to 25016040 its reverse (4061052), we get a palindrome (29077092).

It can be divided in two parts, 250 and 16040, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 25016040 in words is "twenty-five million, sixteen thousand, forty".