199640364 has 48 divisors (see below), whose sum is σ = 580774656. Its totient is φ = 51854400.

The previous prime is 199640359. The next prime is 199640381. The reversal of 199640364 is 463046991.

199640364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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, 107107 + ... + 108954.

It is an arithmetic number, because the mean of its divisors is an integer number (12099472).

Almost surely, 2^199640364 is an apocalyptic number.

199640364 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

199640364 is an abundant number, since it is smaller than the sum of its proper divisors (381134292).

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

199640364 is a wasteful number, since it uses less digits than its factorization.

199640364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216086 (or 216084 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 199640364 is about 14129.4148498797. The cubic root of 199640364 is about 584.4528099809.

The spelling of 199640364 in words is "one hundred ninety-nine million, six hundred forty thousand, three hundred sixty-four".