40406766 has 32 divisors (see below), whose sum is σ = 82950048. Its totient is φ = 13117440.

The previous prime is 40406761. The next prime is 40406789. The reversal of 40406766 is 66760404.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40406761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40870 + ... + 41846.

It is an arithmetic number, because the mean of its divisors is an integer number (2592189).

Almost surely, 2^40406766 is an apocalyptic number.

40406766 is an abundant number, since it is smaller than the sum of its proper divisors (42543282).

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

40406766 is a wasteful number, since it uses less digits than its factorization.

40406766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 40406766 is about 6356.6316552086. The cubic root of 40406766 is about 343.1505485935.

The spelling of 40406766 in words is "forty million, four hundred six thousand, seven hundred sixty-six".