40403764 has 24 divisors (see below), whose sum is σ = 75116160. Its totient is φ = 18950016.

The previous prime is 40403749. The next prime is 40403767. The reversal of 40403764 is 46730404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40403767) 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, 24147 + ... + 25765.

It is an arithmetic number, because the mean of its divisors is an integer number (3129840).

Almost surely, 2^40403764 is an apocalyptic number.

It is an amenable number.

40403764 is a deficient number, since it is larger than the sum of its proper divisors (34712396).

40403764 is a wasteful number, since it uses less digits than its factorization.

40403764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007 (or 2005 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 40403764 is about 6356.3955194749. The cubic root of 40403764 is about 343.1420503182.

The spelling of 40403764 in words is "forty million, four hundred three thousand, seven hundred sixty-four".