40535618 has 4 divisors (see below), whose sum is σ = 60803430. Its totient is φ = 20267808.

The previous prime is 40535587. The next prime is 40535629. The reversal of 40535618 is 81653504.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 35796289 + 4739329 = 5983^2 + 2177^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10133903 + ... + 10133906.

Almost surely, 2^40535618 is an apocalyptic number.

40535618 is a deficient number, since it is larger than the sum of its proper divisors (20267812).

40535618 is a wasteful number, since it uses less digits than its factorization.

40535618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20267811.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 40535618 is about 6366.7588300485. The cubic root of 40535618 is about 343.5149159393.

The spelling of 40535618 in words is "forty million, five hundred thirty-five thousand, six hundred eighteen".