1604663140 has 24 divisors (see below), whose sum is σ = 3377316600. Its totient is φ = 640432128.

The previous prime is 1604663131. The next prime is 1604663141. The reversal of 1604663140 is 413664061.

It can be written as a sum of positive squares in 4 ways, for example, as 543076416 + 1061586724 = 23304^2 + 32582^2 .

It is not an unprimeable number, because it can be changed into a prime (1604663141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80367 + ... + 98326.

It is an arithmetic number, because the mean of its divisors is an integer number (140721525).

Almost surely, 2^1604663140 is an apocalyptic number.

1604663140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1604663140 is an abundant number, since it is smaller than the sum of its proper divisors (1772653460).

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

1604663140 is a wasteful number, since it uses less digits than its factorization.

1604663140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179151 (or 179149 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1604663140 is about 40058.2468413185. The cubic root of 1604663140 is about 1170.7422518809.

The spelling of 1604663140 in words is "one billion, six hundred four million, six hundred sixty-three thousand, one hundred forty".