1670445420 has 192 divisors, whose sum is σ = 5652218880. Its totient is φ = 360087552.

The previous prime is 1670445419. The next prime is 1670445431. The reversal of 1670445420 is 245440761.

1670445420 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2816644 + ... + 2817236.

It is an arithmetic number, because the mean of its divisors is an integer number (29438640).

Almost surely, 2^1670445420 is an apocalyptic number.

1670445420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1670445420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2826109440).

1670445420 is an abundant number, since it is smaller than the sum of its proper divisors (3981773460).

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

1670445420 is a wasteful number, since it uses less digits than its factorization.

1670445420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984 (or 982 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 1670445420 is about 40871.0829315789. The cubic root of 1670445420 is about 1186.5264666598.

The spelling of 1670445420 in words is "one billion, six hundred seventy million, four hundred forty-five thousand, four hundred twenty".