814136400 has 720 divisors, whose sum is σ = 3681014400. Its totient is φ = 167270400.

The previous prime is 814136399. The next prime is 814136413. The reversal of 814136400 is 4631418.

814136400 is a `hidden beast` number, since 8 + 1 + 4 + 13 + 640 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9147556 + ... + 9147644.

It is an arithmetic number, because the mean of its divisors is an integer number (5112520).

Almost surely, 2^814136400 is an apocalyptic number.

814136400 is a gapful number since it is divisible by the number (80) 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 814136400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1840507200).

814136400 is an abundant number, since it is smaller than the sum of its proper divisors (2866878000).

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

814136400 is a wasteful number, since it uses less digits than its factorization.

814136400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 814136400 is about 28533.0755440068. The cubic root of 814136400 is about 933.7538184712.

Adding to 814136400 its reverse (4631418), we get a palindrome (818767818).

The spelling of 814136400 in words is "eight hundred fourteen million, one hundred thirty-six thousand, four hundred".