428016961 has 4 divisors (see below), whose sum is σ = 430168000. Its totient is φ = 425865924.

The previous prime is 428016943. The next prime is 428016991. The reversal of 428016961 is 169610824.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428016961 - 2¹¹ = 428014913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428016961.

It is not an unprimeable number, because it can be changed into a prime (428016991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075221 + ... + 1075618.

It is an arithmetic number, because the mean of its divisors is an integer number (107542000).

Almost surely, 2^428016961 is an apocalyptic number.

It is an amenable number.

428016961 is a deficient number, since it is larger than the sum of its proper divisors (2151039).

428016961 is a wasteful number, since it uses less digits than its factorization.

428016961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151038.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 428016961 is about 20688.5707819559. The cubic root of 428016961 is about 753.6221590493.

The spelling of 428016961 in words is "four hundred twenty-eight million, sixteen thousand, nine hundred sixty-one".