40149818 has 8 divisors (see below), whose sum is σ = 63767412. Its totient is φ = 18894016.

The previous prime is 40149803. The next prime is 40149821. The reversal of 40149818 is 81894104.

It can be written as a sum of positive squares in 2 ways, for example, as 35557369 + 4592449 = 5963^2 + 2143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40149818² = 3224015770866248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590405 + ... + 590472.

Almost surely, 2^40149818 is an apocalyptic number.

40149818 is a deficient number, since it is larger than the sum of its proper divisors (23617594).

40149818 is a wasteful number, since it uses less digits than its factorization.

40149818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180896.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 40149818 is about 6336.3884034993. The cubic root of 40149818 is about 342.4216326642.

The spelling of 40149818 in words is "forty million, one hundred forty-nine thousand, eight hundred eighteen".