1387788152 has 32 divisors (see below), whose sum is σ = 2678209920. Its totient is φ = 673891680.

The previous prime is 1387788121. The next prime is 1387788161. The reversal of 1387788152 is 2518877831.

It is a self number, because there is not a number n which added to its sum of digits gives 1387788152.

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, 19823 + ... + 56289.

It is an arithmetic number, because the mean of its divisors is an integer number (83694060).

Almost surely, 2^1387788152 is an apocalyptic number.

It is an amenable number.

1387788152 is a deficient number, since it is larger than the sum of its proper divisors (1290421768).

1387788152 is a wasteful number, since it uses less digits than its factorization.

1387788152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36611 (or 36607 counting only the distinct ones).

The product of its digits is 752640, while the sum is 50.

The square root of 1387788152 is about 37253.0287627731. The cubic root of 1387788152 is about 1115.4267577533.

The spelling of 1387788152 in words is "one billion, three hundred eighty-seven million, seven hundred eighty-eight thousand, one hundred fifty-two".