1606285890 has 192 divisors, whose sum is σ = 4774210560. Its totient is φ = 388761120.

The previous prime is 1606285883. The next prime is 1606285931. The reversal of 1606285890 is 985826061.

1606285890 is a `hidden beast` number, since 1 + 6 + 0 + 62 + 8 + 589 + 0 = 666.

It is a super-3 number, since 3×1606285890³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2645967 + ... + 2646573.

It is an arithmetic number, because the mean of its divisors is an integer number (24865680).

Almost surely, 2^1606285890 is an apocalyptic number.

1606285890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1606285890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2387105280).

1606285890 is an abundant number, since it is smaller than the sum of its proper divisors (3167924670).

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

1606285890 is an equidigital number, since it uses as much as digits as its factorization.

1606285890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1606285890 is about 40078.4966035404. The cubic root of 1606285890 is about 1171.1367649907.

It can be divided in two parts, 1606 and 285890, that added together give a cube (287496 = 66³).

The spelling of 1606285890 in words is "one billion, six hundred six million, two hundred eighty-five thousand, eight hundred ninety".