428311971 has 12 divisors (see below), whose sum is σ = 620692072. Its totient is φ = 284609376.

The previous prime is 428311943. The next prime is 428311981. The reversal of 428311971 is 179113824.

It is a happy number.

It is not a de Polignac number, because 428311971 - 2¹¹ = 428309923 is a prime.

It is a super-2 number, since 2×428311971² = 366902289003809682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428311931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74746 + ... + 80271.

Almost surely, 2^428311971 is an apocalyptic number.

428311971 is a deficient number, since it is larger than the sum of its proper divisors (192380101).

428311971 is a wasteful number, since it uses less digits than its factorization.

428311971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155330 (or 155327 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 428311971 is about 20695.6993358524. The cubic root of 428311971 is about 753.7952635706.

The spelling of 428311971 in words is "four hundred twenty-eight million, three hundred eleven thousand, nine hundred seventy-one".