102788440 has 32 divisors (see below), whose sum is σ = 231821280. Its totient is φ = 41018112.

The previous prime is 102788437. The next prime is 102788459. The reversal of 102788440 is 44887201.

It is a junction number, because it is equal to n+sod(n) for n = 102788396 and 102788405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15469 + ... + 21091.

It is an arithmetic number, because the mean of its divisors is an integer number (7244415).

Almost surely, 2^102788440 is an apocalyptic number.

102788440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102788440 is an abundant number, since it is smaller than the sum of its proper divisors (129032840).

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

102788440 is a wasteful number, since it uses less digits than its factorization.

102788440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6091 (or 6087 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 102788440 is about 10138.4633944203. The cubic root of 102788440 is about 468.4336570185.

The spelling of 102788440 in words is "one hundred two million, seven hundred eighty-eight thousand, four hundred forty".