6891400 has 24 divisors (see below), whose sum is σ = 16022970. Its totient is φ = 2756480.

The previous prime is 6891383. The next prime is 6891413. The reversal of 6891400 is 41986.

It can be written as a sum of positive squares in 3 ways, for example, as 5503716 + 1387684 = 2346^2 + 1178^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17029 + ... + 17428.

Almost surely, 2^6891400 is an apocalyptic number.

It is an amenable number.

6891400 is an abundant number, since it is smaller than the sum of its proper divisors (9131570).

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

6891400 is a wasteful number, since it uses less digits than its factorization.

6891400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34473 (or 34464 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 6891400 is about 2625.1476148971. The cubic root of 6891400 is about 190.2986991438.

The spelling of 6891400 in words is "six million, eight hundred ninety-one thousand, four hundred".