505720038 has 32 divisors (see below), whose sum is σ = 1049096160. Its totient is φ = 162328320.

The previous prime is 505720037. The next prime is 505720049. The reversal of 505720038 is 830027505.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 505719987 and 505720014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505720031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65418 + ... + 72738.

It is an arithmetic number, because the mean of its divisors is an integer number (32784255).

Almost surely, 2^505720038 is an apocalyptic number.

505720038 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

505720038 is an abundant number, since it is smaller than the sum of its proper divisors (543376122).

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

505720038 is a wasteful number, since it uses less digits than its factorization.

505720038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7752.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 505720038 is about 22488.2199829155. The cubic root of 505720038 is about 796.7157218052.

The spelling of 505720038 in words is "five hundred five million, seven hundred twenty thousand, thirty-eight".