3138781432 has 32 divisors (see below), whose sum is σ = 5932523520. Its totient is φ = 1556805600.

The previous prime is 3138781427. The next prime is 3138781441. The reversal of 3138781432 is 2341878313.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166793 + ... + 1169479.

It is an arithmetic number, because the mean of its divisors is an integer number (185391360).

Almost surely, 2^3138781432 is an apocalyptic number.

It is an amenable number.

3138781432 is a deficient number, since it is larger than the sum of its proper divisors (2793742088).

3138781432 is a wasteful number, since it uses less digits than its factorization.

3138781432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3811 (or 3807 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 3138781432 is about 56024.8287101353. The cubic root of 3138781432 is about 1464.1548989059.

The spelling of 3138781432 in words is "three billion, one hundred thirty-eight million, seven hundred eighty-one thousand, four hundred thirty-two".