250000040 has 32 divisors (see below), whose sum is σ = 568307880. Its totient is φ = 98967552.

The previous prime is 250000019. The next prime is 250000073. The reversal of 250000040 is 40000052.

It can be written as a sum of positive squares in 4 ways, for example, as 189502756 + 60497284 = 13766^2 + 7778^2 .

It is a sliding number, since 250000040 = 40 + 250000000 and 1/40 + 1/250000000 = 0.0250000040.

It is a junction number, because it is equal to n+sod(n) for n = 249999976 and 250000030.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28337 + ... + 36096.

Almost surely, 2^250000040 is an apocalyptic number.

250000040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

250000040 is an abundant number, since it is smaller than the sum of its proper divisors (318307840).

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

250000040 is a wasteful number, since it uses less digits than its factorization.

250000040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64541 (or 64537 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 250000040 is about 15811.3895657529. The cubic root of 250000040 is about 629.9605585453.

Adding to 250000040 its reverse (40000052), we get a palindrome (290000092).

It can be divided in two parts, 2500000 and 40, that multiplied together give a 8-th power (100000000 = 10⁸).

The spelling of 250000040 in words is "two hundred fifty million, forty", and thus it is an aban number.