102728456 has 8 divisors (see below), whose sum is σ = 192615870. Its totient is φ = 51364224.

The previous prime is 102728443. The next prime is 102728473. The reversal of 102728456 is 654827201.

It can be written as a sum of positive squares in only one way, i.e., 102616900 + 111556 = 10130^2 + 334^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 6420521 + ... + 6420536.

Almost surely, 2^102728456 is an apocalyptic number.

It is an amenable number.

102728456 is a deficient number, since it is larger than the sum of its proper divisors (89887414).

102728456 is a wasteful number, since it uses less digits than its factorization.

102728456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12841063 (or 12841059 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 102728456 is about 10135.5047234955. The cubic root of 102728456 is about 468.3425183909.

The spelling of 102728456 in words is "one hundred two million, seven hundred twenty-eight thousand, four hundred fifty-six".