1605132870 has 32 divisors (see below), whose sum is σ = 4202530560. Its totient is φ = 389123040.

The previous prime is 1605132827. The next prime is 1605132887. The reversal of 1605132870 is 782315061.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 2431690 + ... + 2432349.

It is an arithmetic number, because the mean of its divisors is an integer number (131329080).

Almost surely, 2^1605132870 is an apocalyptic number.

1605132870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1605132870 is an abundant number, since it is smaller than the sum of its proper divisors (2597397690).

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

1605132870 is a wasteful number, since it uses less digits than its factorization.

1605132870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4864060.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1605132870 is about 40064.1094996507. The cubic root of 1605132870 is about 1170.8564771229.

The spelling of 1605132870 in words is "one billion, six hundred five million, one hundred thirty-two thousand, eight hundred seventy".