40905012 has 24 divisors (see below), whose sum is σ = 96177312. Its totient is φ = 13530400.

The previous prime is 40905001. The next prime is 40905019. The reversal of 40905012 is 21050904.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 40905012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40905019) 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, 11439 + ... + 14582.

It is an arithmetic number, because the mean of its divisors is an integer number (4007388).

Almost surely, 2^40905012 is an apocalyptic number.

It is an amenable number.

40905012 is an abundant number, since it is smaller than the sum of its proper divisors (55272300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40905012 is a wasteful number, since it uses less digits than its factorization.

40905012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26159 (or 26157 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 40905012 is about 6395.7026197283. The cubic root of 40905012 is about 344.5552260457. Note that the first 3 decimals are identical.

Adding to 40905012 its reverse (21050904), we get a palindrome (61955916).

The spelling of 40905012 in words is "forty million, nine hundred five thousand, twelve".