428013709 has 8 divisors (see below), whose sum is σ = 453454848. Its totient is φ = 402601920.

The previous prime is 428013689. The next prime is 428013731. The reversal of 428013709 is 907310824.

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 428013709 - 2¹³ = 428005517 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 (428013769) 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, 27444 + ... + 40114.

It is an arithmetic number, because the mean of its divisors is an integer number (56681856).

Almost surely, 2^428013709 is an apocalyptic number.

It is an amenable number.

428013709 is a deficient number, since it is larger than the sum of its proper divisors (25441139).

428013709 is a wasteful number, since it uses less digits than its factorization.

428013709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14675.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 428013709 is about 20688.4921876873. The cubic root of 428013709 is about 753.6202504135.

The spelling of 428013709 in words is "four hundred twenty-eight million, thirteen thousand, seven hundred nine".