1605634488 has 80 divisors (see below), whose sum is σ = 4503363480. Its totient is φ = 534485952.

The previous prime is 1605634483. The next prime is 1605634517. The reversal of 1605634488 is 8844365061.

1605634488 is a `hidden beast` number, since 1 + 6 + 0 + 5 + 634 + 4 + 8 + 8 = 666.

1605634488 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605634483) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 707131 + ... + 709397.

Almost surely, 2^1605634488 is an apocalyptic number.

1605634488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1605634488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2251681740).

1605634488 is an abundant number, since it is smaller than the sum of its proper divisors (2897728992).

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

1605634488 is a wasteful number, since it uses less digits than its factorization.

1605634488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378 (or 3365 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 1605634488 is about 40070.3692021923. The cubic root of 1605634488 is about 1170.9784320349.

The spelling of 1605634488 in words is "one billion, six hundred five million, six hundred thirty-four thousand, four hundred eighty-eight".