1685376450 has 48 divisors (see below), whose sum is σ = 4644152160. Its totient is φ = 449433360.

The previous prime is 1685376449. The next prime is 1685376467. The reversal of 1685376450 is 546735861.

1685376450 is a `hidden beast` number, since 1 + 6 + 8 + 537 + 64 + 50 = 666.

It is a super-3 number, since 3×1685376450³ (a number of 29 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1685376396 and 1685376405.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 622864 + ... + 625563.

It is an arithmetic number, because the mean of its divisors is an integer number (96753170).

Almost surely, 2^1685376450 is an apocalyptic number.

1685376450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1685376450 is an abundant number, since it is smaller than the sum of its proper divisors (2958775710).

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

1685376450 is a wasteful number, since it uses less digits than its factorization.

1685376450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248448 (or 1248437 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 1685376450 is about 41053.3366488036. The cubic root of 1685376450 is about 1190.0511829785.

The spelling of 1685376450 in words is "one billion, six hundred eighty-five million, three hundred seventy-six thousand, four hundred fifty".