102788642 has 32 divisors (see below), whose sum is σ = 171383040. Its totient is φ = 45848320.

The previous prime is 102788641. The next prime is 102788663. The reversal of 102788642 is 246887201.

It is a junction number, because it is equal to n+sod(n) for n = 102788596 and 102788605.

It is not an unprimeable number, because it can be changed into a prime (102788641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429959 + ... + 430197.

It is an arithmetic number, because the mean of its divisors is an integer number (5355720).

Almost surely, 2^102788642 is an apocalyptic number.

102788642 is a deficient number, since it is larger than the sum of its proper divisors (68594398).

102788642 is a wasteful number, since it uses less digits than its factorization.

102788642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 102788642 is about 10138.4733564773. The cubic root of 102788642 is about 468.4339638738.

The spelling of 102788642 in words is "one hundred two million, seven hundred eighty-eight thousand, six hundred forty-two".