40395818 has 4 divisors (see below), whose sum is σ = 60593730. Its totient is φ = 20197908.

The previous prime is 40395809. The next prime is 40395827. The reversal of 40395818 is 81859304.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40395809) and next prime (40395827).

It can be written as a sum of positive squares in only one way, i.e., 32684089 + 7711729 = 5717^2 + 2777^2 .

It is a super-2 number, since 2×40395818² = 3263644223778248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10098953 + ... + 10098956.

Almost surely, 2^40395818 is an apocalyptic number.

40395818 is a deficient number, since it is larger than the sum of its proper divisors (20197912).

40395818 is a wasteful number, since it uses less digits than its factorization.

40395818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20197911.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 40395818 is about 6355.7704489700. The cubic root of 40395818 is about 343.1195541840.

The spelling of 40395818 in words is "forty million, three hundred ninety-five thousand, eight hundred eighteen".