40669858 has 4 divisors (see below), whose sum is σ = 61004790. Its totient is φ = 20334928.

The previous prime is 40669847. The next prime is 40669879. The reversal of 40669858 is 85896604.

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., 29560969 + 11108889 = 5437^2 + 3333^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167463 + ... + 10167466.

Almost surely, 2^40669858 is an apocalyptic number.

40669858 is a deficient number, since it is larger than the sum of its proper divisors (20334932).

40669858 is a wasteful number, since it uses less digits than its factorization.

40669858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20334931.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 40669858 is about 6377.2923721592. The cubic root of 40669858 is about 343.8936991271.

It can be divided in two parts, 4066 and 9858, that added together give a square (13924 = 118²).

The spelling of 40669858 in words is "forty million, six hundred sixty-nine thousand, eight hundred fifty-eight".