424251428 has 6 divisors (see below), whose sum is σ = 742440006. Its totient is φ = 212125712.

The previous prime is 424251419. The next prime is 424251431. The reversal of 424251428 is 824152424.

It can be written as a sum of positive squares in only one way, i.e., 418529764 + 5721664 = 20458^2 + 2392^2 .

It is a junction number, because it is equal to n+sod(n) for n = 424251394 and 424251403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53031425 + ... + 53031432.

It is an arithmetic number, because the mean of its divisors is an integer number (123740001).

Almost surely, 2^424251428 is an apocalyptic number.

It is an amenable number.

424251428 is a deficient number, since it is larger than the sum of its proper divisors (318188578).

424251428 is a wasteful number, since it uses less digits than its factorization.

424251428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106062861 (or 106062859 counting only the distinct ones).

The product of its digits is 20480, while the sum is 32.

The square root of 424251428 is about 20597.3645887041. The cubic root of 424251428 is about 751.4056176360.

The spelling of 424251428 in words is "four hundred twenty-four million, two hundred fifty-one thousand, four hundred twenty-eight".