1604199132 has 18 divisors (see below), whose sum is σ = 4055059008. Its totient is φ = 534733032.

The previous prime is 1604199097. The next prime is 1604199133. The reversal of 1604199132 is 2319914061.

It is a happy number.

1604199132 is a `hidden beast` number, since 1 + 604 + 19 + 9 + 1 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 44561087 = 1604199132 / (1 + 6 + 0 + 4 + 1 + 9 + 9 + 1 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604199133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22280508 + ... + 22280579.

It is an arithmetic number, because the mean of its divisors is an integer number (225281056).

Almost surely, 2^1604199132 is an apocalyptic number.

1604199132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1604199132 is an abundant number, since it is smaller than the sum of its proper divisors (2450859876).

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

1604199132 is a wasteful number, since it uses less digits than its factorization.

1604199132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44561097 (or 44561092 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1604199132 is about 40052.4547562319. The cubic root of 1604199132 is about 1170.6293961821.

The spelling of 1604199132 in words is "one billion, six hundred four million, one hundred ninety-nine thousand, one hundred thirty-two".