1387272312 has 32 divisors (see below), whose sum is σ = 3853534800. Its totient is φ = 462424032.

The previous prime is 1387272307. The next prime is 1387272317. The reversal of 1387272312 is 2132727831.

1387272312 is a `hidden beast` number, since 1 + 387 + 272 + 3 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1387272307) and next prime (1387272317).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387272317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3211063 + ... + 3211494.

Almost surely, 2^1387272312 is an apocalyptic number.

1387272312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1387272312 is an abundant number, since it is smaller than the sum of its proper divisors (2466262488).

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

1387272312 is a wasteful number, since it uses less digits than its factorization.

1387272312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6422572 (or 6422562 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 1387272312 is about 37246.1046553864. The cubic root of 1387272312 is about 1115.2885394808.

The spelling of 1387272312 in words is "one billion, three hundred eighty-seven million, two hundred seventy-two thousand, three hundred twelve".