40002530 has 16 divisors (see below), whose sum is σ = 76240440. Its totient is φ = 15059712.

The previous prime is 40002491. The next prime is 40002559. The reversal of 40002530 is 3520004.

It can be written as a sum of positive squares in 4 ways, for example, as 30349081 + 9653449 = 5509^2 + 3107^2 .

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, 117485 + ... + 117824.

Almost surely, 2^40002530 is an apocalyptic number.

40002530 is a deficient number, since it is larger than the sum of its proper divisors (36237910).

40002530 is a wasteful number, since it uses less digits than its factorization.

40002530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235333.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 40002530 is about 6324.7553312361. The cubic root of 40002530 is about 342.0023995819.

Adding to 40002530 its reverse (3520004), we get a palindrome (43522534).

The spelling of 40002530 in words is "forty million, two thousand, five hundred thirty".