102778882 has 8 divisors (see below), whose sum is σ = 157928652. Its totient is φ = 50136000.

The previous prime is 102778873. The next prime is 102778883. The reversal of 102778882 is 288877201.

It can be written as a sum of positive squares in 2 ways, for example, as 100821681 + 1957201 = 10041^2 + 1399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (102778883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626619 + ... + 626782.

Almost surely, 2^102778882 is an apocalyptic number.

102778882 is a deficient number, since it is larger than the sum of its proper divisors (55149770).

102778882 is a wasteful number, since it uses less digits than its factorization.

102778882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253444.

The product of its (nonzero) digits is 100352, while the sum is 43.

The square root of 102778882 is about 10137.9920102553. The cubic root of 102778882 is about 468.4191371377.

The spelling of 102778882 in words is "one hundred two million, seven hundred seventy-eight thousand, eight hundred eighty-two".