428000131 has 4 divisors (see below), whose sum is σ = 460923232. Its totient is φ = 395077032.

The previous prime is 428000119. The next prime is 428000147. The reversal of 428000131 is 131000824.

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 428000131 - 2⁷ = 428000003 is a prime.

It is a super-2 number, since 2×428000131² = 366368224272034322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428000099 and 428000108.

It is not an unprimeable number, because it can be changed into a prime (428000161) 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, 16461531 + ... + 16461556.

It is an arithmetic number, because the mean of its divisors is an integer number (115230808).

Almost surely, 2^428000131 is an apocalyptic number.

428000131 is a deficient number, since it is larger than the sum of its proper divisors (32923101).

428000131 is a wasteful number, since it uses less digits than its factorization.

428000131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32923100.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 428000131 is about 20688.1640316390. The cubic root of 428000131 is about 753.6122812265.

Adding to 428000131 its reverse (131000824), we get a palindrome (559000955).

The spelling of 428000131 in words is "four hundred twenty-eight million, one hundred thirty-one", and thus it is an aban number.