506381388 has 24 divisors (see below), whose sum is σ = 1243744320. Its totient is φ = 159909840.

The previous prime is 506381387. The next prime is 506381399. The reversal of 506381388 is 883183605.

It is a super-2 number, since 2×506381388² = 512844220225613088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (506381387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110258 + ... + 1110713.

It is an arithmetic number, because the mean of its divisors is an integer number (51822680).

Almost surely, 2^506381388 is an apocalyptic number.

It is an amenable number.

506381388 is an abundant number, since it is smaller than the sum of its proper divisors (737362932).

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

506381388 is a wasteful number, since it uses less digits than its factorization.

506381388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220997 (or 2220995 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 506381388 is about 22502.9195439170. The cubic root of 506381388 is about 797.0628693596.

The spelling of 506381388 in words is "five hundred six million, three hundred eighty-one thousand, three hundred eighty-eight".