428814987 has 8 divisors (see below), whose sum is σ = 605385936. Its totient is φ = 269060352.

The previous prime is 428814983. The next prime is 428815001. The reversal of 428814987 is 789418824.

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

It is not a de Polignac number, because 428814987 - 2² = 428814983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 8408137 = 428814987 / (4 + 2 + 8 + 8 + 1 + 4 + 9 + 8 + 7).

It is not an unprimeable number, because it can be changed into a prime (428814983) 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, 4204018 + ... + 4204119.

It is an arithmetic number, because the mean of its divisors is an integer number (75673242).

Almost surely, 2^428814987 is an apocalyptic number.

428814987 is a deficient number, since it is larger than the sum of its proper divisors (176570949).

428814987 is a wasteful number, since it uses less digits than its factorization.

428814987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408157.

The product of its digits is 1032192, while the sum is 51.

The square root of 428814987 is about 20707.8484396617. The cubic root of 428814987 is about 754.0902376129.

The spelling of 428814987 in words is "four hundred twenty-eight million, eight hundred fourteen thousand, nine hundred eighty-seven".