521026480 has 80 divisors (see below), whose sum is σ = 1313290944. Its totient is φ = 191093760.

The previous prime is 521026459. The next prime is 521026487. The reversal of 521026480 is 84620125.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×521026480² = 542937185722380800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (521026487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161685 + ... + 164875.

Almost surely, 2^521026480 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 521026480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656645472).

521026480 is an abundant number, since it is smaller than the sum of its proper divisors (792264464).

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

521026480 is a wasteful number, since it uses less digits than its factorization.

521026480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374 (or 3368 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 521026480 is about 22826.0044685880. The cubic root of 521026480 is about 804.6739314431.

The spelling of 521026480 in words is "five hundred twenty-one million, twenty-six thousand, four hundred eighty".