505071390 has 16 divisors (see below), whose sum is σ = 1212171408. Its totient is φ = 134685696.

The previous prime is 505071331. The next prime is 505071419. The reversal of 505071390 is 93170505.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 16835713 = 505071390 / (5 + 0 + 5 + 0 + 7 + 1 + 3 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8417827 + ... + 8417886.

It is an arithmetic number, because the mean of its divisors is an integer number (75760713).

Almost surely, 2^505071390 is an apocalyptic number.

505071390 is an abundant number, since it is smaller than the sum of its proper divisors (707100018).

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

505071390 is a wasteful number, since it uses less digits than its factorization.

505071390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16835723.

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 505071390 is about 22473.7934047637. The cubic root of 505071390 is about 796.3749475123.

The spelling of 505071390 in words is "five hundred five million, seventy-one thousand, three hundred ninety".