1338707690 has 16 divisors (see below), whose sum is σ = 2412219528. Its totient is φ = 534917376.

The previous prime is 1338707683. The next prime is 1338707701. The reversal of 1338707690 is 967078331.

It can be written as a sum of positive squares in 4 ways, for example, as 924707281 + 414000409 = 30409^2 + 20347^2 .

It is a super-2 number, since 2×1338707690² = 3584276558530272200, which contains 22 as substring.

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, 60707 + ... + 79766.

Almost surely, 2^1338707690 is an apocalyptic number.

1338707690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1338707690 is a deficient number, since it is larger than the sum of its proper divisors (1073511838).

1338707690 is a wasteful number, since it uses less digits than its factorization.

1338707690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141433.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 1338707690 is about 36588.3545680863. The cubic root of 1338707690 is about 1102.1192450478.

The spelling of 1338707690 in words is "one billion, three hundred thirty-eight million, seven hundred seven thousand, six hundred ninety".