1688079146 has 36 divisors (see below), whose sum is σ = 2833726086. Its totient is φ = 753835680.

The previous prime is 1688079131. The next prime is 1688079179. The reversal of 1688079146 is 6419708861.

It can be written as a sum of positive squares in 3 ways, for example, as 811623121 + 876456025 = 28489^2 + 29605^2 .

It is a super-2 number, since 2×1688079146² = 5699222406320178632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1688079094 and 1688079103.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 322220 + ... + 327416.

Almost surely, 2^1688079146 is an apocalyptic number.

1688079146 is a deficient number, since it is larger than the sum of its proper divisors (1145646940).

1688079146 is a wasteful number, since it uses less digits than its factorization.

1688079146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287 (or 5243 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 1688079146 is about 41086.2403488078. The cubic root of 1688079146 is about 1190.6869714677.

The spelling of 1688079146 in words is "one billion, six hundred eighty-eight million, seventy-nine thousand, one hundred forty-six".