128522998 has 4 divisors (see below), whose sum is σ = 192784500. Its totient is φ = 64261498.

The previous prime is 128522971. The next prime is 128523013. The reversal of 128522998 is 899225821.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×128522998² = 33036322029816008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32130748 + ... + 32130751.

It is an arithmetic number, because the mean of its divisors is an integer number (48196125).

Almost surely, 2^128522998 is an apocalyptic number.

128522998 is a deficient number, since it is larger than the sum of its proper divisors (64261502).

128522998 is an equidigital number, since it uses as much as digits as its factorization.

128522998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64261501.

The product of its digits is 207360, while the sum is 46.

The square root of 128522998 is about 11336.7984016653. The cubic root of 128522998 is about 504.6538790902.

The spelling of 128522998 in words is "one hundred twenty-eight million, five hundred twenty-two thousand, nine hundred ninety-eight".