505788401 has 4 divisors (see below), whose sum is σ = 510699072. Its totient is φ = 500877732.

The previous prime is 505788389. The next prime is 505788421. The reversal of 505788401 is 104887505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505788401 - 2⁶ = 505788337 is a prime.

It is a super-2 number, since 2×505788401² = 511643813172273602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505788421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2455181 + ... + 2455386.

It is an arithmetic number, because the mean of its divisors is an integer number (127674768).

Almost surely, 2^505788401 is an apocalyptic number.

It is an amenable number.

505788401 is a deficient number, since it is larger than the sum of its proper divisors (4910671).

505788401 is a wasteful number, since it uses less digits than its factorization.

505788401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4910670.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 505788401 is about 22489.7399051212. The cubic root of 505788401 is about 796.7516200748.

The spelling of 505788401 in words is "five hundred five million, seven hundred eighty-eight thousand, four hundred one".