6919999400 has 48 divisors (see below), whose sum is σ = 16254910140. Its totient is φ = 2739456000.

The previous prime is 6919999399. The next prime is 6919999403. The reversal of 6919999400 is 49999196.

It can be written as a sum of positive squares in 6 ways, for example, as 3082692484 + 3837306916 = 55522^2 + 61946^2 .

It is not an unprimeable number, because it can be changed into a prime (6919999403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158951 + ... + 197750.

Almost surely, 2^6919999400 is an apocalyptic number.

It is an amenable number.

6919999400 is an abundant number, since it is smaller than the sum of its proper divisors (9334910740).

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

6919999400 is a wasteful number, since it uses less digits than its factorization.

6919999400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356814 (or 356805 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 56.

The square root of 6919999400 is about 83186.5337659888. The cubic root of 6919999400 is about 1905.6158318336.

The spelling of 6919999400 in words is "six billion, nine hundred nineteen million, nine hundred ninety-nine thousand, four hundred".