199021340 has 72 divisors (see below), whose sum is σ = 488490912. Its totient is φ = 67912320.

The previous prime is 199021331. The next prime is 199021351. The reversal of 199021340 is 43120991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304454 + ... + 305106.

It is an arithmetic number, because the mean of its divisors is an integer number (6784596).

Almost surely, 2^199021340 is an apocalyptic number.

199021340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199021340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244245456).

199021340 is an abundant number, since it is smaller than the sum of its proper divisors (289469572).

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

199021340 is a wasteful number, since it uses less digits than its factorization.

199021340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 199021340 is about 14107.4923356350. The cubic root of 199021340 is about 583.8481144702.

The spelling of 199021340 in words is "one hundred ninety-nine million, twenty-one thousand, three hundred forty".