513942428 has 24 divisors (see below), whose sum is σ = 931467264. Its totient is φ = 247863600.

The previous prime is 513942427. The next prime is 513942491. The reversal of 513942428 is 824249315.

It is a junction number, because it is equal to n+sod(n) for n = 513942391 and 513942400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513942427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31901 + ... + 45227.

It is an arithmetic number, because the mean of its divisors is an integer number (38811136).

Almost surely, 2^513942428 is an apocalyptic number.

It is an amenable number.

513942428 is a deficient number, since it is larger than the sum of its proper divisors (417524836).

513942428 is a wasteful number, since it uses less digits than its factorization.

513942428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13673 (or 13671 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 513942428 is about 22670.2983659236. The cubic root of 513942428 is about 801.0104045660.

The spelling of 513942428 in words is "five hundred thirteen million, nine hundred forty-two thousand, four hundred twenty-eight".