1387755338 has 4 divisors (see below), whose sum is σ = 2081633010. Its totient is φ = 693877668.

The previous prime is 1387755329. The next prime is 1387755349. The reversal of 1387755338 is 8335577831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8335577831 = 7 ⋅1190796833.

It can be written as a sum of positive squares in only one way, i.e., 719687929 + 668067409 = 26827^2 + 25847^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346938833 + ... + 346938836.

Almost surely, 2^1387755338 is an apocalyptic number.

1387755338 is a deficient number, since it is larger than the sum of its proper divisors (693877672).

1387755338 is an equidigital number, since it uses as much as digits as its factorization.

1387755338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693877671.

The product of its digits is 2116800, while the sum is 50.

The square root of 1387755338 is about 37252.5883396040. The cubic root of 1387755338 is about 1115.4179663293.

The spelling of 1387755338 in words is "one billion, three hundred eighty-seven million, seven hundred fifty-five thousand, three hundred thirty-eight".