1680456290 has 32 divisors (see below), whose sum is σ = 3257055360. Its totient is φ = 621915904.

The previous prime is 1680456287. The next prime is 1680456317. The reversal of 1680456290 is 926540861.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73742 + ... + 93801.

It is an arithmetic number, because the mean of its divisors is an integer number (101782980).

Almost surely, 2^1680456290 is an apocalyptic number.

1680456290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1680456290 is a deficient number, since it is larger than the sum of its proper divisors (1576599070).

1680456290 is a wasteful number, since it uses less digits than its factorization.

1680456290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167626.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1680456290 is about 40993.3688539988. The cubic root of 1680456290 is about 1188.8920058956.

The spelling of 1680456290 in words is "one billion, six hundred eighty million, four hundred fifty-six thousand, two hundred ninety".