128231476 has 12 divisors (see below), whose sum is σ = 237605508. Its totient is φ = 60344192.

The previous prime is 128231473. The next prime is 128231489. The reversal of 128231476 is 674132821.

It can be written as a sum of positive squares in 2 ways, for example, as 107619876 + 20611600 = 10374^2 + 4540^2 .

It is a super-2 number, since 2×128231476² = 32886622874277152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128231473) 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, 942811 + ... + 942946.

It is an arithmetic number, because the mean of its divisors is an integer number (19800459).

Almost surely, 2^128231476 is an apocalyptic number.

It is an amenable number.

128231476 is a deficient number, since it is larger than the sum of its proper divisors (109374032).

128231476 is a wasteful number, since it uses less digits than its factorization.

128231476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885778 (or 1885776 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 128231476 is about 11323.9337687925. The cubic root of 128231476 is about 504.2720302280.

The spelling of 128231476 in words is "one hundred twenty-eight million, two hundred thirty-one thousand, four hundred seventy-six".