40043542 has 16 divisors (see below), whose sum is σ = 74886912. Its totient is φ = 15601320.

The previous prime is 40043533. The next prime is 40043557. The reversal of 40043542 is 24534004.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129858 + ... + 130165.

It is an arithmetic number, because the mean of its divisors is an integer number (4680432).

Almost surely, 2^40043542 is an apocalyptic number.

40043542 is a deficient number, since it is larger than the sum of its proper divisors (34843370).

40043542 is a wasteful number, since it uses less digits than its factorization.

40043542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260043.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 40043542 is about 6327.9966814151. The cubic root of 40043542 is about 342.1192372899.

Adding to 40043542 its reverse (24534004), we get a palindrome (64577546).

The spelling of 40043542 in words is "forty million, forty-three thousand, five hundred forty-two".