199457540 has 24 divisors (see below), whose sum is σ = 419126400. Its totient is φ = 79732448.

The previous prime is 199457537. The next prime is 199457567. The reversal of 199457540 is 45754991.

It is a junction number, because it is equal to n+sod(n) for n = 199457491 and 199457500.

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, 58811 + ... + 62109.

It is an arithmetic number, because the mean of its divisors is an integer number (17463600).

Almost surely, 2^199457540 is an apocalyptic number.

199457540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199457540 is an abundant number, since it is smaller than the sum of its proper divisors (219668860).

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

199457540 is a wasteful number, since it uses less digits than its factorization.

199457540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6331 (or 6329 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 199457540 is about 14122.9437441349. The cubic root of 199457540 is about 584.2743480170.

The spelling of 199457540 in words is "one hundred ninety-nine million, four hundred fifty-seven thousand, five hundred forty".