128770450 has 24 divisors (see below), whose sum is σ = 243578160. Its totient is φ = 50634000.

The previous prime is 128770409. The next prime is 128770487. The reversal of 128770450 is 54077821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18876 + ... + 24775.

It is an arithmetic number, because the mean of its divisors is an integer number (10149090).

Almost surely, 2^128770450 is an apocalyptic number.

128770450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128770450 is a deficient number, since it is larger than the sum of its proper divisors (114807710).

128770450 is a wasteful number, since it uses less digits than its factorization.

128770450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43722 (or 43717 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 128770450 is about 11347.7068167978. The cubic root of 128770450 is about 504.9775502225.

The spelling of 128770450 in words is "one hundred twenty-eight million, seven hundred seventy thousand, four hundred fifty".