1387218612 has 24 divisors (see below), whose sum is σ = 3485831776. Its totient is φ = 426836448.

The previous prime is 1387218593. The next prime is 1387218667. The reversal of 1387218612 is 2168127831.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 4446058 + ... + 4446369.

Almost surely, 2^1387218612 is an apocalyptic number.

1387218612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1387218612 is an abundant number, since it is smaller than the sum of its proper divisors (2098613164).

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

1387218612 is a wasteful number, since it uses less digits than its factorization.

1387218612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8892447 (or 8892445 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 1387218612 is about 37245.3837676564. The cubic root of 1387218612 is about 1115.2741487067.

The spelling of 1387218612 in words is "one billion, three hundred eighty-seven million, two hundred eighteen thousand, six hundred twelve".