40401442 has 4 divisors (see below), whose sum is σ = 60602166. Its totient is φ = 20200720.

The previous prime is 40401433. The next prime is 40401451. The reversal of 40401442 is 24410404.

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

It is an interprime number because it is at equal distance from previous prime (40401433) and next prime (40401451).

It can be written as a sum of positive squares in only one way, i.e., 23435281 + 16966161 = 4841^2 + 4119^2 .

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, 10100359 + ... + 10100362.

Almost surely, 2^40401442 is an apocalyptic number.

40401442 is a deficient number, since it is larger than the sum of its proper divisors (20200724).

40401442 is a wasteful number, since it uses less digits than its factorization.

40401442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20200723.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 40401442 is about 6356.2128661649. The cubic root of 40401442 is about 343.1354767467.

Adding to 40401442 its reverse (24410404), we get a palindrome (64811846).

The spelling of 40401442 in words is "forty million, four hundred one thousand, four hundred forty-two".