428981031 has 24 divisors (see below), whose sum is σ = 654030000. Its totient is φ = 270196992.

The previous prime is 428981023. The next prime is 428981051. The reversal of 428981031 is 130189824.

It is not a de Polignac number, because 428981031 - 2³ = 428981023 is a prime.

It is a super-2 number, since 2×428981031² = 368049449915645922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428981051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63295 + ... + 69743.

It is an arithmetic number, because the mean of its divisors is an integer number (27251250).

Almost surely, 2^428981031 is an apocalyptic number.

428981031 is a deficient number, since it is larger than the sum of its proper divisors (225048969).

428981031 is a wasteful number, since it uses less digits than its factorization.

428981031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6863 (or 6860 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 428981031 is about 20711.8572561709. The cubic root of 428981031 is about 754.1875569738.

The spelling of 428981031 in words is "four hundred twenty-eight million, nine hundred eighty-one thousand, thirty-one".