128873450 has 24 divisors (see below), whose sum is σ = 241246092. Its totient is φ = 51217920.

The previous prime is 128873441. The next prime is 128873453. The reversal of 128873450 is 54378821.

It can be written as a sum of positive squares in 6 ways, for example, as 20151121 + 108722329 = 4489^2 + 10427^2 .

It is a super-2 number, since 2×128873450² = 33216732229805000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128873453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359 + ... + 16058.

Almost surely, 2^128873450 is an apocalyptic number.

128873450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128873450 is a deficient number, since it is larger than the sum of its proper divisors (112372642).

128873450 is a wasteful number, since it uses less digits than its factorization.

128873450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16586 (or 16581 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 128873450 is about 11352.2442715086. The cubic root of 128873450 is about 505.1121536349.

The spelling of 128873450 in words is "one hundred twenty-eight million, eight hundred seventy-three thousand, four hundred fifty".