230128438 has 32 divisors (see below), whose sum is σ = 369515520. Its totient is φ = 107309280.

The previous prime is 230128429. The next prime is 230128447. The reversal of 230128438 is 834821032.

It is an interprime number because it is at equal distance from previous prime (230128429) and next prime (230128447).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193281 + ... + 194467.

It is an arithmetic number, because the mean of its divisors is an integer number (11547360).

Almost surely, 2^230128438 is an apocalyptic number.

230128438 is a deficient number, since it is larger than the sum of its proper divisors (139387082).

230128438 is a wasteful number, since it uses less digits than its factorization.

230128438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 230128438 is about 15169.9847725698. The cubic root of 230128438 is about 612.8065941380.

The spelling of 230128438 in words is "two hundred thirty million, one hundred twenty-eight thousand, four hundred thirty-eight".