521438946 has 32 divisors (see below), whose sum is σ = 1196633088. Its totient is φ = 148386000.

The previous prime is 521438933. The next prime is 521438969. The reversal of 521438946 is 649834125.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 521438898 and 521438907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14190 + ... + 35273.

It is an arithmetic number, because the mean of its divisors is an integer number (37394784).

Almost surely, 2^521438946 is an apocalyptic number.

521438946 is an abundant number, since it is smaller than the sum of its proper divisors (675194142).

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

521438946 is a wasteful number, since it uses less digits than its factorization.

521438946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49726.

The product of its digits is 207360, while the sum is 42.

The square root of 521438946 is about 22835.0376833497. The cubic root of 521438946 is about 804.8862131005.

The spelling of 521438946 in words is "five hundred twenty-one million, four hundred thirty-eight thousand, nine hundred forty-six".