428675997 has 4 divisors (see below), whose sum is σ = 571568000. Its totient is φ = 285783996.

The previous prime is 428675981. The next prime is 428676023. The reversal of 428675997 is 799576824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 428675997 - 2⁴ = 428675981 is a prime.

It is a super-2 number, since 2×428675997² = 367526220807888018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428675917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71445997 + ... + 71446002.

It is an arithmetic number, because the mean of its divisors is an integer number (142892000).

Almost surely, 2^428675997 is an apocalyptic number.

It is an amenable number.

428675997 is a deficient number, since it is larger than the sum of its proper divisors (142892003).

428675997 is a wasteful number, since it uses less digits than its factorization.

428675997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142892002.

The product of its digits is 7620480, while the sum is 57.

The square root of 428675997 is about 20704.4921937245. The cubic root of 428675997 is about 754.0087554420.

The spelling of 428675997 in words is "four hundred twenty-eight million, six hundred seventy-five thousand, nine hundred ninety-seven".