1387471388 has 24 divisors (see below), whose sum is σ = 2595876192. Its totient is φ = 646585344.

The previous prime is 1387471387. The next prime is 1387471417. The reversal of 1387471388 is 8831747831.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387471381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92045 + ... + 106052.

It is an arithmetic number, because the mean of its divisors is an integer number (108161508).

Almost surely, 2^1387471388 is an apocalyptic number.

It is an amenable number.

1387471388 is a deficient number, since it is larger than the sum of its proper divisors (1208404804).

1387471388 is a wasteful number, since it uses less digits than its factorization.

1387471388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198221 (or 198219 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 1387471388 is about 37248.7770000573. Note that the first 3 decimals coincide. The cubic root of 1387471388 is about 1115.3418855469.

The spelling of 1387471388 in words is "one billion, three hundred eighty-seven million, four hundred seventy-one thousand, three hundred eighty-eight".