40549406 has 4 divisors (see below), whose sum is σ = 60824112. Its totient is φ = 20274702.

The previous prime is 40549381. The next prime is 40549423. The reversal of 40549406 is 60494504.

It is a happy number.

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

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, 10137350 + ... + 10137353.

It is an arithmetic number, because the mean of its divisors is an integer number (15206028).

Almost surely, 2^40549406 is an apocalyptic number.

40549406 is a deficient number, since it is larger than the sum of its proper divisors (20274706).

40549406 is a wasteful number, since it uses less digits than its factorization.

40549406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20274705.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 40549406 is about 6367.8415495362. The cubic root of 40549406 is about 343.5538598523.

The spelling of 40549406 in words is "forty million, five hundred forty-nine thousand, four hundred six".