40209764 has 12 divisors (see below), whose sum is σ = 80419584. Its totient is φ = 17232744.

The previous prime is 40209761. The next prime is 40209847. The reversal of 40209764 is 46790204.

40209764 is an admirable number.

It is a hoax number, since the sum of its digits (32) 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 40209764.

It is not an unprimeable number, because it can be changed into a prime (40209761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718004 + ... + 718059.

It is an arithmetic number, because the mean of its divisors is an integer number (6701632).

Almost surely, 2^40209764 is an apocalyptic number.

It is an amenable number.

40209764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40209764 is a wasteful number, since it uses less digits than its factorization.

40209764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436074 (or 1436072 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40209764 is about 6341.1169363133. The cubic root of 40209764 is about 342.5919663525.

Adding to 40209764 its reverse (46790204), we get a palindrome (86999968).

The spelling of 40209764 in words is "forty million, two hundred nine thousand, seven hundred sixty-four".