428520379 has 4 divisors (see below), whose sum is σ = 489737584. Its totient is φ = 367303176.

The previous prime is 428520373. The next prime is 428520419. The reversal of 428520379 is 973025824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428520379 - 2³ = 428520371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428520371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30608592 + ... + 30608605.

It is an arithmetic number, because the mean of its divisors is an integer number (122434396).

Almost surely, 2^428520379 is an apocalyptic number.

428520379 is a deficient number, since it is larger than the sum of its proper divisors (61217205).

428520379 is an equidigital number, since it uses as much as digits as its factorization.

428520379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61217204.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 428520379 is about 20700.7337792649. The cubic root of 428520379 is about 753.9175042898.

Subtracting 428520379 from its reverse (973025824), we obtain a palindrome (544505445).

The spelling of 428520379 in words is "four hundred twenty-eight million, five hundred twenty thousand, three hundred seventy-nine".