40442146 has 32 divisors (see below), whose sum is σ = 66067200. Its totient is φ = 18506880.

The previous prime is 40442141. The next prime is 40442177. The reversal of 40442146 is 64124404.

It is a self number, because there is not a number n which added to its sum of digits gives 40442146.

It is not an unprimeable number, because it can be changed into a prime (40442141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169095 + ... + 169333.

It is an arithmetic number, because the mean of its divisors is an integer number (2064600).

Almost surely, 2^40442146 is an apocalyptic number.

40442146 is a deficient number, since it is larger than the sum of its proper divisors (25625054).

40442146 is a wasteful number, since it uses less digits than its factorization.

40442146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 40442146 is about 6359.4139667111. The cubic root of 40442146 is about 343.2506731180.

The spelling of 40442146 in words is "forty million, four hundred forty-two thousand, one hundred forty-six".