128531450 has 24 divisors (see below), whose sum is σ = 239491740. Its totient is φ = 51321600.

The previous prime is 128531449. The next prime is 128531467. The reversal of 128531450 is 54135821.

It can be written as a sum of positive squares in 6 ways, for example, as 81018001 + 47513449 = 9001^2 + 6893^2 .

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, 31106 + ... + 34994.

Almost surely, 2^128531450 is an apocalyptic number.

128531450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128531450 is a deficient number, since it is larger than the sum of its proper divisors (110960290).

128531450 is a wasteful number, since it uses less digits than its factorization.

128531450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562 (or 4557 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 128531450 is about 11337.1711639192. The cubic root of 128531450 is about 504.6649412896.

The spelling of 128531450 in words is "one hundred twenty-eight million, five hundred thirty-one thousand, four hundred fifty".