1387763442 has 120 divisors (see below), whose sum is σ = 3398241924. Its totient is φ = 423086976.

The previous prime is 1387763441. The next prime is 1387763491. The reversal of 1387763442 is 2443677831.

1387763442 is a `hidden beast` number, since 1 + 3 + 8 + 7 + 7 + 634 + 4 + 2 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 865595241 + 522168201 = 29421^2 + 22851^2 .

It is not an unprimeable number, because it can be changed into a prime (1387763441) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4736248 + ... + 4736540.

Almost surely, 2^1387763442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1387763442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1699120962).

1387763442 is an abundant number, since it is smaller than the sum of its proper divisors (2010478482).

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

1387763442 is a wasteful number, since it uses less digits than its factorization.

1387763442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 484 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 1387763442 is about 37252.6971104107. The cubic root of 1387763442 is about 1115.4201375405.

The spelling of 1387763442 in words is "one billion, three hundred eighty-seven million, seven hundred sixty-three thousand, four hundred forty-two".