520147690 has 8 divisors (see below), whose sum is σ = 936265860. Its totient is φ = 208059072.

The previous prime is 520147681. The next prime is 520147721. The reversal of 520147690 is 96741025.

It can be written as a sum of positive squares in 2 ways, for example, as 474760521 + 45387169 = 21789^2 + 6737^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×520147690² = 541107238824672200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26007375 + ... + 26007394.

Almost surely, 2^520147690 is an apocalyptic number.

520147690 is a deficient number, since it is larger than the sum of its proper divisors (416118170).

520147690 is a wasteful number, since it uses less digits than its factorization.

520147690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52014776.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 520147690 is about 22806.7465895511. The cubic root of 520147690 is about 804.2212754072.

The spelling of 520147690 in words is "five hundred twenty million, one hundred forty-seven thousand, six hundred ninety".