1606140440 has 32 divisors (see below), whose sum is σ = 3630962160. Its totient is φ = 639408000.

The previous prime is 1606140427. The next prime is 1606140479. The reversal of 1606140440 is 440416061.

It is a super-2 number, since 2×1606140440² = 5159374226006787200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86711 + ... + 103590.

Almost surely, 2^1606140440 is an apocalyptic number.

1606140440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1606140440 is an abundant number, since it is smaller than the sum of its proper divisors (2024821720).

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

1606140440 is a wasteful number, since it uses less digits than its factorization.

1606140440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190523 (or 190519 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1606140440 is about 40076.6819983890. The cubic root of 1606140440 is about 1171.1014149149.

The spelling of 1606140440 in words is "one billion, six hundred six million, one hundred forty thousand, four hundred forty".