515042428 has 12 divisors (see below), whose sum is σ = 906360840. Its totient is φ = 256082192.

The previous prime is 515042419. The next prime is 515042461. The reversal of 515042428 is 824240515.

It is a self number, because there is not a number n which added to its sum of digits gives 515042428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358951 + ... + 360382.

It is an arithmetic number, because the mean of its divisors is an integer number (75530070).

Almost surely, 2^515042428 is an apocalyptic number.

It is an amenable number.

515042428 is a deficient number, since it is larger than the sum of its proper divisors (391318412).

515042428 is a wasteful number, since it uses less digits than its factorization.

515042428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719516 (or 719514 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 515042428 is about 22694.5462170981. The cubic root of 515042428 is about 801.5814695492.

The spelling of 515042428 in words is "five hundred fifteen million, forty-two thousand, four hundred twenty-eight".