428669740726 has 8 divisors (see below), whose sum is σ = 643242153240. Its totient is φ = 214255689648.

The previous prime is 428669740687. The next prime is 428669740781. The reversal of 428669740726 is 627047966824.

It is a happy number.

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

It is a super-2 number, since 2×428669740726² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39583591 + ... + 39594418.

It is an arithmetic number, because the mean of its divisors is an integer number (80405269155).

Almost surely, 2^428669740726 is an apocalyptic number.

428669740726 is a deficient number, since it is larger than the sum of its proper divisors (214572412514).

428669740726 is a wasteful number, since it uses less digits than its factorization.

428669740726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79180718.

The product of its (nonzero) digits is 48771072, while the sum is 61.

The spelling of 428669740726 in words is "four hundred twenty-eight billion, six hundred sixty-nine million, seven hundred forty thousand, seven hundred twenty-six".