1606743378 has 20 divisors (see below), whose sum is σ = 3600295710. Its totient is φ = 535581072.

The previous prime is 1606743373. The next prime is 1606743403. The reversal of 1606743378 is 8733476061.

1606743378 is a `hidden beast` number, since 1 + 606 + 7 + 4 + 3 + 37 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1285007409 + 321735969 = 35847^2 + 17937^2 .

It is not an unprimeable number, because it can be changed into a prime (1606743371) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4958923 + ... + 4959246.

Almost surely, 2^1606743378 is an apocalyptic number.

1606743378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1606743378 is an abundant number, since it is smaller than the sum of its proper divisors (1993552332).

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

1606743378 is an equidigital number, since it uses as much as digits as its factorization.

1606743378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9918183 (or 9918174 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 1606743378 is about 40084.2035969283. The cubic root of 1606743378 is about 1171.2479386745.

The spelling of 1606743378 in words is "one billion, six hundred six million, seven hundred forty-three thousand, three hundred seventy-eight".