199800454 has 16 divisors (see below), whose sum is σ = 343015200. Its totient is φ = 85503744.

The previous prime is 199800449. The next prime is 199800463. The reversal of 199800454 is 454008991.

It is a super-2 number, since 2×199800454² = 79840442837212232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139 + ... + 19990.

It is an arithmetic number, because the mean of its divisors is an integer number (21438450).

Almost surely, 2^199800454 is an apocalyptic number.

199800454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

199800454 is a deficient number, since it is larger than the sum of its proper divisors (143214746).

199800454 is a wasteful number, since it uses less digits than its factorization.

199800454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20847.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 199800454 is about 14135.0788466142. The cubic root of 199800454 is about 584.6089909087.

The spelling of 199800454 in words is "one hundred ninety-nine million, eight hundred thousand, four hundred fifty-four".