102640038 has 16 divisors (see below), whose sum is σ = 207313776. Its totient is φ = 33874400.

The previous prime is 102639997. The next prime is 102640049. The reversal of 102640038 is 830046201.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 84081 + ... + 85292.

It is an arithmetic number, because the mean of its divisors is an integer number (12957111).

Almost surely, 2^102640038 is an apocalyptic number.

102640038 is an abundant number, since it is smaller than the sum of its proper divisors (104673738).

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

102640038 is a wasteful number, since it uses less digits than its factorization.

102640038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169479.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 102640038 is about 10131.1419889369. The cubic root of 102640038 is about 468.2081129349.

Adding to 102640038 its reverse (830046201), we get a palindrome (932686239).

The spelling of 102640038 in words is "one hundred two million, six hundred forty thousand, thirty-eight".