1688375452 has 12 divisors (see below), whose sum is σ = 2955012760. Its totient is φ = 844086096.

The previous prime is 1688375443. The next prime is 1688375573. The reversal of 1688375452 is 2545738861.

It is a happy number.

It is a super-2 number, since 2×1688375452² = 5701223333832408608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1688375396 and 1688375405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21658 + ... + 62014.

Almost surely, 2^1688375452 is an apocalyptic number.

It is an amenable number.

1688375452 is a deficient number, since it is larger than the sum of its proper divisors (1266637308).

1688375452 is a wasteful number, since it uses less digits than its factorization.

1688375452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50820 (or 50818 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 49.

The square root of 1688375452 is about 41089.8460936519. The cubic root of 1688375452 is about 1190.7566338913.

The spelling of 1688375452 in words is "one billion, six hundred eighty-eight million, three hundred seventy-five thousand, four hundred fifty-two".