199284540 has 384 divisors, whose sum is σ = 772208640. Its totient is φ = 37158912.

The previous prime is 199284539. The next prime is 199284551. The reversal of 199284540 is 45482991.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 199284492 and 199284501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1763524 + ... + 1763636.

It is an arithmetic number, because the mean of its divisors is an integer number (2010960).

Almost surely, 2^199284540 is an apocalyptic number.

199284540 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 199284540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386104320).

199284540 is an abundant number, since it is smaller than the sum of its proper divisors (572924100).

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

199284540 is a wasteful number, since it uses less digits than its factorization.

199284540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 199284540 is about 14116.8176300468. The cubic root of 199284540 is about 584.1053752118.

The spelling of 199284540 in words is "one hundred ninety-nine million, two hundred eighty-four thousand, five hundred forty".