102728507 has 4 divisors (see below), whose sum is σ = 117404016. Its totient is φ = 88053000.

The previous prime is 102728489. The next prime is 102728531. The reversal of 102728507 is 705827201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 102728507 - 2⁶ = 102728443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102728537) 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, 7337744 + ... + 7337757.

It is an arithmetic number, because the mean of its divisors is an integer number (29351004).

Almost surely, 2^102728507 is an apocalyptic number.

102728507 is a deficient number, since it is larger than the sum of its proper divisors (14675509).

102728507 is an equidigital number, since it uses as much as digits as its factorization.

102728507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14675508.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 102728507 is about 10135.5072394035. The cubic root of 102728507 is about 468.3425958945.

The spelling of 102728507 in words is "one hundred two million, seven hundred twenty-eight thousand, five hundred seven".