512161380 has 144 divisors (see below), whose sum is σ = 1706140800. Its totient is φ = 128521728.

The previous prime is 512161379. The next prime is 512161417. The reversal of 512161380 is 83161215.

512161380 is a `hidden beast` number, since 512 + 16 + 138 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79521 + ... + 85719.

It is an arithmetic number, because the mean of its divisors is an integer number (11848200).

Almost surely, 2^512161380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 512161380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (853070400).

512161380 is an abundant number, since it is smaller than the sum of its proper divisors (1193979420).

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

512161380 is a wasteful number, since it uses less digits than its factorization.

512161380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6240 (or 6226 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 512161380 is about 22630.9827449008. The cubic root of 512161380 is about 800.0840432539.

The spelling of 512161380 in words is "five hundred twelve million, one hundred sixty-one thousand, three hundred eighty".