199438740 has 48 divisors (see below), whose sum is σ = 620477760. Its totient is φ = 53183520.

The previous prime is 199438721. The next prime is 199438751. The reversal of 199438740 is 47834991.

199438740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×199438740² = 79551622025575200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184126 + ... + 185205.

It is an arithmetic number, because the mean of its divisors is an integer number (12926620).

Almost surely, 2^199438740 is an apocalyptic number.

199438740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199438740 is an abundant number, since it is smaller than the sum of its proper divisors (421039020).

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

199438740 is a wasteful number, since it uses less digits than its factorization.

199438740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369349 (or 369341 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 199438740 is about 14122.2781448320. The cubic root of 199438740 is about 584.2559903875.

The spelling of 199438740 in words is "one hundred ninety-nine million, four hundred thirty-eight thousand, seven hundred forty".