3940264487 has 4 divisors (see below), whose sum is σ = 3960894336. Its totient is φ = 3919634640.

The previous prime is 3940264469. The next prime is 3940264499. The reversal of 3940264487 is 7844620493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7844620493 = 47 ⋅166906819.

It is a cyclic number.

It is not a de Polignac number, because 3940264487 - 2¹⁸ = 3940002343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940264417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10314638 + ... + 10315019.

It is an arithmetic number, because the mean of its divisors is an integer number (990223584).

Almost surely, 2^3940264487 is an apocalyptic number.

3940264487 is a deficient number, since it is larger than the sum of its proper divisors (20629849).

3940264487 is a wasteful number, since it uses less digits than its factorization.

3940264487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20629848.

The product of its (nonzero) digits is 1161216, while the sum is 47.

The square root of 3940264487 is about 62771.5260846827. The cubic root of 3940264487 is about 1579.4593683890.

The spelling of 3940264487 in words is "three billion, nine hundred forty million, two hundred sixty-four thousand, four hundred eighty-seven".