25400140 has 24 divisors (see below), whose sum is σ = 53817120. Its totient is φ = 10069248.

The previous prime is 25400083. The next prime is 25400147. The reversal of 25400140 is 4100452.

It is a super-2 number, since 2×25400140² = 1290334224039200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25400147) 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 7 ways as a sum of consecutive naturals, for example, 3360 + ... + 7879.

It is an arithmetic number, because the mean of its divisors is an integer number (2242380).

Almost surely, 2^25400140 is an apocalyptic number.

25400140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25400140 is an abundant number, since it is smaller than the sum of its proper divisors (28416980).

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

25400140 is a wasteful number, since it uses less digits than its factorization.

25400140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11361 (or 11359 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 25400140 is about 5039.8551566488. The cubic root of 25400140 is about 293.9535459637.

Adding to 25400140 its reverse (4100452), we get a palindrome (29500592).

The spelling of 25400140 in words is "twenty-five million, four hundred thousand, one hundred forty".