428146931 has 8 divisors (see below), whose sum is σ = 451896720. Its totient is φ = 404518752.

The previous prime is 428146913. The next prime is 428146963. The reversal of 428146931 is 139641824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428146931 - 2⁶ = 428146867 is a prime.

It is a super-2 number, since 2×428146931² = 366619589049437522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428140931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23120 + ... + 37293.

It is an arithmetic number, because the mean of its divisors is an integer number (56487090).

Almost surely, 2^428146931 is an apocalyptic number.

428146931 is a deficient number, since it is larger than the sum of its proper divisors (23749789).

428146931 is a wasteful number, since it uses less digits than its factorization.

428146931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60805.

The product of its digits is 41472, while the sum is 38.

The square root of 428146931 is about 20691.7116498370. The cubic root of 428146931 is about 753.6984320077.

The spelling of 428146931 in words is "four hundred twenty-eight million, one hundred forty-six thousand, nine hundred thirty-one".