128137850 has 48 divisors (see below), whose sum is σ = 246600288. Its totient is φ = 49506240.

The previous prime is 128137831. The next prime is 128137859. The reversal of 128137850 is 58731821.

It is a self number, because there is not a number n which added to its sum of digits gives 128137850.

It is not an unprimeable number, because it can be changed into a prime (128137859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229772 + ... + 230328.

It is an arithmetic number, because the mean of its divisors is an integer number (5137506).

Almost surely, 2^128137850 is an apocalyptic number.

128137850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128137850 is a deficient number, since it is larger than the sum of its proper divisors (118462438).

128137850 is a wasteful number, since it uses less digits than its factorization.

128137850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 128137850 is about 11319.7990264845. The cubic root of 128137850 is about 504.1492718387.

The spelling of 128137850 in words is "one hundred twenty-eight million, one hundred thirty-seven thousand, eight hundred fifty".