199406901828 has 24 divisors (see below), whose sum is σ = 465295230400. Its totient is φ = 66467187360.

The previous prime is 199406901821. The next prime is 199406901839. The reversal of 199406901828 is 828109604991.

It is a super-2 number, since 2×199406901828² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199406901821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291873 + ... + 695703.

Almost surely, 2^199406901828 is an apocalyptic number.

It is an amenable number.

199406901828 is an abundant number, since it is smaller than the sum of its proper divisors (265888328572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199406901828 is a wasteful number, since it uses less digits than its factorization.

199406901828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444987 (or 444985 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 57.

The spelling of 199406901828 in words is "one hundred ninety-nine billion, four hundred six million, nine hundred one thousand, eight hundred twenty-eight".