40442406 has 32 divisors (see below), whose sum is σ = 84341760. Its totient is φ = 12915936.

The previous prime is 40442377. The next prime is 40442407. The reversal of 40442406 is 60424404.

40442406 = T₁₄₆₀ + T₁₄₆₁ + ... + T₁₄₉₆.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40442407) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 13515 + ... + 16233.

It is an arithmetic number, because the mean of its divisors is an integer number (2635680).

Almost surely, 2^40442406 is an apocalyptic number.

40442406 is an abundant number, since it is smaller than the sum of its proper divisors (43899354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40442406 is a wasteful number, since it uses less digits than its factorization.

40442406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 40442406 is about 6359.4344088134. The cubic root of 40442406 is about 343.2514086953.

The spelling of 40442406 in words is "forty million, four hundred forty-two thousand, four hundred six".