1387161492 has 24 divisors (see below), whose sum is σ = 3238154976. Its totient is φ = 462180768.

The previous prime is 1387161473. The next prime is 1387161493. The reversal of 1387161492 is 2941617831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387161493) 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, 3538 + ... + 52790.

It is an arithmetic number, because the mean of its divisors is an integer number (134923124).

Almost surely, 2^1387161492 is an apocalyptic number.

1387161492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1387161492 is an abundant number, since it is smaller than the sum of its proper divisors (1850993484).

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

1387161492 is a wasteful number, since it uses less digits than its factorization.

1387161492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51607 (or 51605 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 1387161492 is about 37244.6169533263. The cubic root of 1387161492 is about 1115.2588410175.

The spelling of 1387161492 in words is "one billion, three hundred eighty-seven million, one hundred sixty-one thousand, four hundred ninety-two".