102378728 has 16 divisors (see below), whose sum is σ = 192760260. Its totient is φ = 50976000.

The previous prime is 102378721. The next prime is 102378739. The reversal of 102378728 is 827873201.

It can be written as a sum of positive squares in 2 ways, for example, as 91738084 + 10640644 = 9578^2 + 3262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102378691 and 102378700.

It is not an unprimeable number, because it can be changed into a prime (102378721) 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, 24623 + ... + 28478.

Almost surely, 2^102378728 is an apocalyptic number.

It is an amenable number.

102378728 is a deficient number, since it is larger than the sum of its proper divisors (90381532).

102378728 is a wasteful number, since it uses less digits than its factorization.

102378728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53348 (or 53344 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 102378728 is about 10118.2373959104. The cubic root of 102378728 is about 467.8104401907.

The spelling of 102378728 in words is "one hundred two million, three hundred seventy-eight thousand, seven hundred twenty-eight".