428014819491 has 64 divisors (see below), whose sum is σ = 715397308416. Its totient is φ = 221972889600.

The previous prime is 428014819451. The next prime is 428014819499. The reversal of 428014819491 is 194918410824.

It is not a de Polignac number, because 428014819491 - 2²⁵ = 427981265059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (428014819499) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3041011 + ... + 3178643.

It is an arithmetic number, because the mean of its divisors is an integer number (11178082944).

Almost surely, 2^428014819491 is an apocalyptic number.

428014819491 is a deficient number, since it is larger than the sum of its proper divisors (287382488925).

428014819491 is a wasteful number, since it uses less digits than its factorization.

428014819491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137972.

The product of its (nonzero) digits is 663552, while the sum is 51.

The spelling of 428014819491 in words is "four hundred twenty-eight billion, fourteen million, eight hundred nineteen thousand, four hundred ninety-one".