1390830138 has 12 divisors (see below), whose sum is σ = 3013465338. Its totient is φ = 463610040.

The previous prime is 1390830137. The next prime is 1390830139. The reversal of 1390830138 is 8310380931.

It is an interprime number because it is at equal distance from previous prime (1390830137) and next prime (1390830139).

It can be written as a sum of positive squares in only one way, i.e., 1116695889 + 274134249 = 33417^2 + 16557^2 .

It is not an unprimeable number, because it can be changed into a prime (1390830131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38634153 + ... + 38634188.

Almost surely, 2^1390830138 is an apocalyptic number.

1390830138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1390830138 is an abundant number, since it is smaller than the sum of its proper divisors (1622635200).

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

1390830138 is a wasteful number, since it uses less digits than its factorization.

1390830138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77268349 (or 77268346 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1390830138 is about 37293.8351205665. The cubic root of 1390830138 is about 1116.2411559244.

The spelling of 1390830138 in words is "one billion, three hundred ninety million, eight hundred thirty thousand, one hundred thirty-eight".