40145236 has 6 divisors (see below), whose sum is σ = 70254170. Its totient is φ = 20072616.

The previous prime is 40145227. The next prime is 40145243. The reversal of 40145236 is 63254104.

It can be written as a sum of positive squares in only one way, i.e., 35760400 + 4384836 = 5980^2 + 2094^2 .

It is a super-2 number, since 2×40145236² = 3223279946991392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40145236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5018151 + ... + 5018158.

Almost surely, 2^40145236 is an apocalyptic number.

It is an amenable number.

40145236 is a deficient number, since it is larger than the sum of its proper divisors (30108934).

40145236 is a wasteful number, since it uses less digits than its factorization.

40145236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10036313 (or 10036311 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 40145236 is about 6336.0268307513. The cubic root of 40145236 is about 342.4086061576.

The spelling of 40145236 in words is "forty million, one hundred forty-five thousand, two hundred thirty-six".