6311390400 has 588 divisors, whose sum is σ = 26645049072. Its totient is φ = 1440737280.

The previous prime is 6311390389. The next prime is 6311390401. The reversal of 6311390400 is 40931136.

6311390400 is a `hidden beast` number, since 63 + 113 + 90 + 400 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6311390401) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 8164414 + ... + 8165186.

Almost surely, 2^6311390400 is an apocalyptic number.

6311390400 is a gapful number since it is divisible by the number (60) 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 6311390400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13322524536).

6311390400 is an abundant number, since it is smaller than the sum of its proper divisors (20333658672).

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

6311390400 is an equidigital number, since it uses as much as digits as its factorization.

6311390400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 6311390400 is about 79444.2597045249. The cubic root of 6311390400 is about 1848.0271542645.

The spelling of 6311390400 in words is "six billion, three hundred eleven million, three hundred ninety thousand, four hundred".