1680700400 has 30 divisors (see below), whose sum is σ = 4037883672. Its totient is φ = 672280000.

The previous prime is 1680700369. The next prime is 1680700409. The reversal of 1680700400 is 40070861.

It is a self number, because there is not a number n which added to its sum of digits gives 1680700400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680700409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2100476 + ... + 2101275.

Almost surely, 2^1680700400 is an apocalyptic number.

1680700400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1680700400 is an abundant number, since it is smaller than the sum of its proper divisors (2357183272).

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

1680700400 is a wasteful number, since it uses less digits than its factorization.

1680700400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201769 (or 4201758 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1680700400 is about 40996.3461786535. The cubic root of 1680700400 is about 1188.9495708910.

The spelling of 1680700400 in words is "one billion, six hundred eighty million, seven hundred thousand, four hundred".