128199436 has 6 divisors (see below), whose sum is σ = 224349020. Its totient is φ = 64099716.

The previous prime is 128199433. The next prime is 128199481. The reversal of 128199436 is 634991821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128199392 and 128199401.

It is not an unprimeable number, because it can be changed into a prime (128199433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16024926 + ... + 16024933.

Almost surely, 2^128199436 is an apocalyptic number.

It is an amenable number.

128199436 is a deficient number, since it is larger than the sum of its proper divisors (96149584).

128199436 is a wasteful number, since it uses less digits than its factorization.

128199436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32049863 (or 32049861 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 128199436 is about 11322.5189776834. The cubic root of 128199436 is about 504.2300274837.

The spelling of 128199436 in words is "one hundred twenty-eight million, one hundred ninety-nine thousand, four hundred thirty-six".