428961997 has 8 divisors (see below), whose sum is σ = 453196800. Its totient is φ = 405356784.

The previous prime is 428961959. The next prime is 428962007. The reversal of 428961997 is 799169824.

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 428961997 - 2²⁷ = 294744269 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 (428961397) 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, 155997 + ... + 158722.

It is an arithmetic number, because the mean of its divisors is an integer number (56649600).

Almost surely, 2^428961997 is an apocalyptic number.

428961997 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

428961997 is a deficient number, since it is larger than the sum of its proper divisors (24234803).

428961997 is a wasteful number, since it uses less digits than its factorization.

428961997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314795.

The product of its digits is 1959552, while the sum is 55.

The square root of 428961997 is about 20711.3977558252. The cubic root of 428961997 is about 754.1764023095.

The spelling of 428961997 in words is "four hundred twenty-eight million, nine hundred sixty-one thousand, nine hundred ninety-seven".