3940494520 has 32 divisors (see below), whose sum is σ = 8910684000. Its totient is φ = 1568274048.

The previous prime is 3940494511. The next prime is 3940494539. The reversal of 3940494520 is 254940493.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 239559 + ... + 255478.

It is an arithmetic number, because the mean of its divisors is an integer number (278458875).

Almost surely, 2^3940494520 is an apocalyptic number.

It is an amenable number.

3940494520 is an abundant number, since it is smaller than the sum of its proper divisors (4970189480).

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

3940494520 is a wasteful number, since it uses less digits than its factorization.

3940494520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495247 (or 495243 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 3940494520 is about 62773.3583616489. The cubic root of 3940494520 is about 1579.4901041182.

The spelling of 3940494520 in words is "three billion, nine hundred forty million, four hundred ninety-four thousand, five hundred twenty".