424672520 has 32 divisors (see below), whose sum is σ = 988464600. Its totient is φ = 164011008.

The previous prime is 424672519. The next prime is 424672541. The reversal of 424672520 is 25276424.

Added to its reverse (25276424) it gives a square (449948944 = 21212²).

It can be written as a sum of positive squares in 4 ways, for example, as 279759076 + 144913444 = 16726^2 + 12038^2 .

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, 181889 + ... + 184208.

Almost surely, 2^424672520 is an apocalyptic number.

424672520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

424672520 is an abundant number, since it is smaller than the sum of its proper divisors (563792080).

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

424672520 is a wasteful number, since it uses less digits than its factorization.

424672520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366137 (or 366133 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 424672520 is about 20607.5840408331. The cubic root of 424672520 is about 751.6541387144.

Adding to 424672520 its reverse (25276424), we get a square (449948944 = 21212²).

The spelling of 424672520 in words is "four hundred twenty-four million, six hundred seventy-two thousand, five hundred twenty".