428379281 has 8 divisors (see below), whose sum is σ = 473905728. Its totient is φ = 383950000.

The previous prime is 428379269. The next prime is 428379283. The reversal of 428379281 is 182973824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428379281 is a prime.

It is a super-2 number, since 2×428379281² = 367017616780153922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428379283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273470 + ... + 275031.

It is an arithmetic number, because the mean of its divisors is an integer number (59238216).

Almost surely, 2^428379281 is an apocalyptic number.

It is an amenable number.

428379281 is a deficient number, since it is larger than the sum of its proper divisors (45526447).

428379281 is a wasteful number, since it uses less digits than its factorization.

428379281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548583.

The product of its digits is 193536, while the sum is 44.

The square root of 428379281 is about 20697.3254552370. The cubic root of 428379281 is about 753.8347482648.

The spelling of 428379281 in words is "four hundred twenty-eight million, three hundred seventy-nine thousand, two hundred eighty-one".