40002500 has 30 divisors (see below), whose sum is σ = 87482934. Its totient is φ = 16000000.

The previous prime is 40002491. The next prime is 40002559. The reversal of 40002500 is 520004.

It can be written as a sum of positive squares in 5 ways, for example, as 8620096 + 31382404 = 2936^2 + 5602^2 .

It is a sliding number, since 40002500 = 2500 + 40000000 and 1/2500 + 1/40000000 = 0.00040002500.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 5501 + ... + 10500.

Almost surely, 2^40002500 is an apocalyptic number.

It is an amenable number.

40002500 is an abundant number, since it is smaller than the sum of its proper divisors (47480434).

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

40002500 is a wasteful number, since it uses less digits than its factorization.

40002500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16025 (or 16008 counting only the distinct ones).

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

The square root of 40002500 is about 6324.7529596025. The cubic root of 40002500 is about 342.0023140867.

Adding to 40002500 its reverse (520004), we get a palindrome (40522504).

It can be divided in two parts, 4000 and 2500, that multiplied together give a 7-th power (10000000 = 10⁷).

The spelling of 40002500 in words is "forty million, two thousand, five hundred".