428681145 has 16 divisors (see below), whose sum is σ = 687529152. Its totient is φ = 228083520.

The previous prime is 428681093. The next prime is 428681167. The reversal of 428681145 is 541186824.

It is not a de Polignac number, because 428681145 - 2⁹ = 428680633 is a prime.

It is a super-3 number, since 3×428681145³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27627 + ... + 40256.

It is an arithmetic number, because the mean of its divisors is an integer number (42970572).

Almost surely, 2^428681145 is an apocalyptic number.

It is an amenable number.

428681145 is a deficient number, since it is larger than the sum of its proper divisors (258848007).

428681145 is a wasteful number, since it uses less digits than its factorization.

428681145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68312.

The product of its digits is 61440, while the sum is 39.

The square root of 428681145 is about 20704.6165141980. The cubic root of 428681145 is about 754.0117737445.

The spelling of 428681145 in words is "four hundred twenty-eight million, six hundred eighty-one thousand, one hundred forty-five".