428131677 has 8 divisors (see below), whose sum is σ = 572144320. Its totient is φ = 284770080.

The previous prime is 428131673. The next prime is 428131681. The reversal of 428131677 is 776131824.

It is an interprime number because it is at equal distance from previous prime (428131673) and next prime (428131681).

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

It is not a de Polignac number, because 428131677 - 2² = 428131673 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428131673) 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, 161224 + ... + 163857.

It is an arithmetic number, because the mean of its divisors is an integer number (71518040).

Almost surely, 2^428131677 is an apocalyptic number.

It is an amenable number.

428131677 is a deficient number, since it is larger than the sum of its proper divisors (144012643).

428131677 is a wasteful number, since it uses less digits than its factorization.

428131677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325523.

The product of its digits is 56448, while the sum is 39.

The square root of 428131677 is about 20691.3430448582. The cubic root of 428131677 is about 753.6894809898.

The spelling of 428131677 in words is "four hundred twenty-eight million, one hundred thirty-one thousand, six hundred seventy-seven".