102776378 has 8 divisors (see below), whose sum is σ = 154804980. Its totient is φ = 51174720.

The previous prime is 102776371. The next prime is 102776411. The reversal of 102776378 is 873677201.

It can be written as a sum of positive squares in 2 ways, for example, as 96491329 + 6285049 = 9823^2 + 2507^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102776371) 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, 106133 + ... + 107096.

Almost surely, 2^102776378 is an apocalyptic number.

102776378 is a deficient number, since it is larger than the sum of its proper divisors (52028602).

102776378 is a wasteful number, since it uses less digits than its factorization.

102776378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213472.

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 102776378 is about 10137.8685136472. The cubic root of 102776378 is about 468.4153330779.

The spelling of 102776378 in words is "one hundred two million, seven hundred seventy-six thousand, three hundred seventy-eight".