513634420 has 24 divisors (see below), whose sum is σ = 1161604584. Its totient is φ = 189649536.

The previous prime is 513634417. The next prime is 513634469. The reversal of 513634420 is 24436315.

It can be written as a sum of positive squares in 4 ways, for example, as 39614436 + 474019984 = 6294^2 + 21772^2 .

It is a congruent number.

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, 987499 + ... + 988018.

It is an arithmetic number, because the mean of its divisors is an integer number (48400191).

Almost surely, 2^513634420 is an apocalyptic number.

It is an amenable number.

513634420 is an abundant number, since it is smaller than the sum of its proper divisors (647970164).

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

513634420 is a wasteful number, since it uses less digits than its factorization.

513634420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975539 (or 1975537 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 513634420 is about 22663.5041421224. The cubic root of 513634420 is about 800.8503562143.

The spelling of 513634420 in words is "five hundred thirteen million, six hundred thirty-four thousand, four hundred twenty".