428405007 has 8 divisors (see below), whose sum is σ = 571307776. Its totient is φ = 285552792.

The previous prime is 428404979. The next prime is 428405009. The reversal of 428405007 is 700504824.

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

It is not a de Polignac number, because 428405007 - 2⁶ = 428404943 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 (428405009) 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, 17208 + ... + 33954.

It is an arithmetic number, because the mean of its divisors is an integer number (71413472).

Almost surely, 2^428405007 is an apocalyptic number.

428405007 is a deficient number, since it is larger than the sum of its proper divisors (142902769).

428405007 is a wasteful number, since it uses less digits than its factorization.

428405007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25277.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 428405007 is about 20697.9469271713. The cubic root of 428405007 is about 753.8498382916.

The spelling of 428405007 in words is "four hundred twenty-eight million, four hundred five thousand, seven".