40442738 has 24 divisors (see below), whose sum is σ = 70811100. Its totient is φ = 17273088.

The previous prime is 40442737. The next prime is 40442761. The reversal of 40442738 is 83724404.

40442738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 39601849 + 840889 = 6293^2 + 917^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40442737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39578 + ... + 40586.

Almost surely, 2^40442738 is an apocalyptic number.

40442738 is a deficient number, since it is larger than the sum of its proper divisors (30368362).

40442738 is a wasteful number, since it uses less digits than its factorization.

40442738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1427 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 40442738 is about 6359.4605117101. The cubic root of 40442738 is about 343.2523479665.

The spelling of 40442738 in words is "forty million, four hundred forty-two thousand, seven hundred thirty-eight".