102999438 has 24 divisors (see below), whose sum is σ = 231431928. Its totient is φ = 34332984.

The previous prime is 102999409. The next prime is 102999461. The reversal of 102999438 is 834999201.

It is a junction number, because it is equal to n+sod(n) for n = 102999393 and 102999402.

It is a congruent number.

It is an unprimeable number.

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, 105481 + ... + 106452.

It is an arithmetic number, because the mean of its divisors is an integer number (9642997).

Almost surely, 2^102999438 is an apocalyptic number.

102999438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

102999438 is an abundant number, since it is smaller than the sum of its proper divisors (128432490).

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

102999438 is an equidigital number, since it uses as much as digits as its factorization.

102999438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211950 (or 211938 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 102999438 is about 10148.8638773017. The cubic root of 102999438 is about 468.7539622065.

The spelling of 102999438 in words is "one hundred two million, nine hundred ninety-nine thousand, four hundred thirty-eight".