1670400320 has 28 divisors (see below), whose sum is σ = 3977641524. Its totient is φ = 668160000.

The previous prime is 1670400313. The next prime is 1670400341. The reversal of 1670400320 is 230040761.

It can be written as a sum of positive squares in 2 ways, for example, as 913490176 + 756910144 = 30224^2 + 27512^2 .

It is a super-2 number, since 2×1670400320² = 5580474458112204800, which contains 22 as substring.

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, 2609681 + ... + 2610320.

Almost surely, 2^1670400320 is an apocalyptic number.

1670400320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1670400320 is an abundant number, since it is smaller than the sum of its proper divisors (2307241204).

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

1670400320 is an equidigital number, since it uses as much as digits as its factorization.

1670400320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220018 (or 5220008 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 1670400320 is about 40870.5311930246. The cubic root of 1670400320 is about 1186.5157883053.

The spelling of 1670400320 in words is "one billion, six hundred seventy million, four hundred thousand, three hundred twenty".