40405546 has 16 divisors (see below), whose sum is σ = 61915680. Its totient is φ = 19770480.

The previous prime is 40405543. The next prime is 40405559. The reversal of 40405546 is 64550404.

It is not an unprimeable number, because it can be changed into a prime (40405543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26965 + ... + 28423.

It is an arithmetic number, because the mean of its divisors is an integer number (3869730).

Almost surely, 2^40405546 is an apocalyptic number.

40405546 is a deficient number, since it is larger than the sum of its proper divisors (21510134).

40405546 is a wasteful number, since it uses less digits than its factorization.

40405546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 40405546 is about 6356.5356917113. The cubic root of 40405546 is about 343.1470949814.

The spelling of 40405546 in words is "forty million, four hundred five thousand, five hundred forty-six".