102788638 has 16 divisors (see below), whose sum is σ = 156533760. Its totient is φ = 50614200.

The previous prime is 102788629. The next prime is 102788641. The reversal of 102788638 is 836887201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 102788594 and 102788603.

It is a congruent number.

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, 99183 + ... + 100213.

It is an arithmetic number, because the mean of its divisors is an integer number (9783360).

Almost surely, 2^102788638 is an apocalyptic number.

102788638 is a deficient number, since it is larger than the sum of its proper divisors (53745122).

102788638 is a wasteful number, since it uses less digits than its factorization.

102788638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 102788638 is about 10138.4731592089. The cubic root of 102788638 is about 468.4339577974.

The spelling of 102788638 in words is "one hundred two million, seven hundred eighty-eight thousand, six hundred thirty-eight".