521674340 has 24 divisors (see below), whose sum is σ = 1195108992. Its totient is φ = 189699680.

The previous prime is 521674337. The next prime is 521674421. The reversal of 521674340 is 43476125.

It is a junction number, because it is equal to n+sod(n) for n = 521674297 and 521674306.

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, 1185404 + ... + 1185843.

It is an arithmetic number, because the mean of its divisors is an integer number (49796208).

Almost surely, 2^521674340 is an apocalyptic number.

It is an amenable number.

521674340 is an abundant number, since it is smaller than the sum of its proper divisors (673434652).

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

521674340 is a wasteful number, since it uses less digits than its factorization.

521674340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371267 (or 2371265 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 521674340 is about 22840.1913301969. The cubic root of 521674340 is about 805.0073118943.

The spelling of 521674340 in words is "five hundred twenty-one million, six hundred seventy-four thousand, three hundred forty".