2500040 has 16 divisors (see below), whose sum is σ = 5625180. Its totient is φ = 1000000.

The previous prime is 2500027. The next prime is 2500049. The reversal of 2500040 is 400052.

It can be written as a sum of positive squares in 2 ways, for example, as 2256004 + 244036 = 1502^2 + 494^2 .

It is a sliding number, since 2500040 = 40 + 2500000 and 1/40 + 1/2500000 = 0.02500040.

It is a junction number, because it is equal to n+sod(n) for n = 2499994 and 2500030.

It is not an unprimeable number, because it can be changed into a prime (2500049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31211 + ... + 31290.

2^2500040 is an apocalyptic number.

2500040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2500040 is an abundant number, since it is smaller than the sum of its proper divisors (3125140).

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

2500040 is a wasteful number, since it uses less digits than its factorization.

2500040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62512 (or 62508 counting only the distinct ones).

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

The square root of 2500040 is about 1581.1514791442. The cubic root of 2500040 is about 135.7216046706.

Adding to 2500040 its reverse (400052), we get a palindrome (2900092).

It can be divided in two parts, 25000 and 40, that multiplied together give a 6-th power (1000000 = 10⁶).

The spelling of 2500040 in words is "two million, five hundred thousand, forty".