120728890 has 8 divisors (see below), whose sum is σ = 217312020. Its totient is φ = 48291552.

The previous prime is 120728851. The next prime is 120728893. The reversal of 120728890 is 98827021.

It can be written as a sum of positive squares in 2 ways, for example, as 118962649 + 1766241 = 10907^2 + 1329^2 .

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 (120728893) 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, 6036435 + ... + 6036454.

Almost surely, 2^120728890 is an apocalyptic number.

120728890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120728890 is a deficient number, since it is larger than the sum of its proper divisors (96583130).

120728890 is a wasteful number, since it uses less digits than its factorization.

120728890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12072896.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 120728890 is about 10987.6699076738. The cubic root of 120728890 is about 494.2390648471.

The spelling of 120728890 in words is "one hundred twenty million, seven hundred twenty-eight thousand, eight hundred ninety".