40669742 has 4 divisors (see below), whose sum is σ = 61004616. Its totient is φ = 20334870.

The previous prime is 40669693. The next prime is 40669757. The reversal of 40669742 is 24796604.

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

It is a junction number, because it is equal to n+sod(n) for n = 40669696 and 40669705.

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, 10167434 + ... + 10167437.

It is an arithmetic number, because the mean of its divisors is an integer number (15251154).

Almost surely, 2^40669742 is an apocalyptic number.

40669742 is a deficient number, since it is larger than the sum of its proper divisors (20334874).

40669742 is a wasteful number, since it uses less digits than its factorization.

40669742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20334873.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 40669742 is about 6377.2832773839. The cubic root of 40669742 is about 343.8933721716.

The spelling of 40669742 in words is "forty million, six hundred sixty-nine thousand, seven hundred forty-two".