102930138 has 24 divisors (see below), whose sum is σ = 236134548. Its totient is φ = 32291712.

The previous prime is 102930133. The next prime is 102930143. The reversal of 102930138 is 831039201.

It is an interprime number because it is at equal distance from previous prime (102930133) and next prime (102930143).

It can be written as a sum of positive squares in 2 ways, for example, as 92217609 + 10712529 = 9603^2 + 3273^2 .

It is a super-2 number, since 2×102930138² = 21189226617398088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102930133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167881 + ... + 168492.

Almost surely, 2^102930138 is an apocalyptic number.

102930138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

102930138 is an abundant number, since it is smaller than the sum of its proper divisors (133204410).

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

102930138 is a wasteful number, since it uses less digits than its factorization.

102930138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336398 (or 336395 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 102930138 is about 10145.4491275645. The cubic root of 102930138 is about 468.6488097307.

Adding to 102930138 its reverse (831039201), we get a palindrome (933969339).

The spelling of 102930138 in words is "one hundred two million, nine hundred thirty thousand, one hundred thirty-eight".