1605947928 has 64 divisors (see below), whose sum is σ = 4348844640. Its totient is φ = 491265024.

The previous prime is 1605947923. The next prime is 1605947933. The reversal of 1605947928 is 8297495061.

1605947928 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1605947923) and next prime (1605947933).

It is a super-3 number, since 3×1605947928³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605947921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39100 + ... + 68852.

Almost surely, 2^1605947928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1605947928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2174422320).

1605947928 is an abundant number, since it is smaller than the sum of its proper divisors (2742896712).

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

1605947928 is a wasteful number, since it uses less digits than its factorization.

1605947928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29948 (or 29944 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 1605947928 is about 40074.2801307771. The cubic root of 1605947928 is about 1171.0546236385.

The spelling of 1605947928 in words is "one billion, six hundred five million, nine hundred forty-seven thousand, nine hundred twenty-eight".