523720400 has 60 divisors (see below), whose sum is σ = 1437994272. Its totient is φ = 179560320.

The previous prime is 523720387. The next prime is 523720489. The reversal of 523720400 is 4027325.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90722 + ... + 96321.

Almost surely, 2^523720400 is an apocalyptic number.

523720400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

523720400 is an abundant number, since it is smaller than the sum of its proper divisors (914273872).

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

523720400 is a wasteful number, since it uses less digits than its factorization.

523720400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187068 (or 187057 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 523720400 is about 22884.9382782650. The cubic root of 523720400 is about 806.0583792354.

Adding to 523720400 its reverse (4027325), we get a palindrome (527747725).

The spelling of 523720400 in words is "five hundred twenty-three million, seven hundred twenty thousand, four hundred".