504040656 has 180 divisors, whose sum is σ = 1572149376. Its totient is φ = 138741120.

The previous prime is 504040651. The next prime is 504040661. The reversal of 504040656 is 656040405.

It is an interprime number because it is at equal distance from previous prime (504040651) and next prime (504040661).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504040651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2260161 + ... + 2260383.

Almost surely, 2^504040656 is an apocalyptic number.

504040656 is a gapful number since it is divisible by the number (56) 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 504040656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786074688).

504040656 is an abundant number, since it is smaller than the sum of its proper divisors (1068108720).

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

504040656 is a wasteful number, since it uses less digits than its factorization.

504040656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 504040656 is about 22450.8497834714. The cubic root of 504040656 is about 795.8328394894.

The spelling of 504040656 in words is "five hundred four million, forty thousand, six hundred fifty-six".