428626207438 has 32 divisors (see below), whose sum is σ = 755395048800. Its totient is φ = 179830364160.

The previous prime is 428626207409. The next prime is 428626207439. The reversal of 428626207438 is 834702626824.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428626207439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4716606 + ... + 4806622.

It is an arithmetic number, because the mean of its divisors is an integer number (23606095275).

Almost surely, 2^428626207438 is an apocalyptic number.

428626207438 is a deficient number, since it is larger than the sum of its proper divisors (326768841362).

428626207438 is a wasteful number, since it uses less digits than its factorization.

428626207438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106692.

The product of its (nonzero) digits is 6193152, while the sum is 52.

The spelling of 428626207438 in words is "four hundred twenty-eight billion, six hundred twenty-six million, two hundred seven thousand, four hundred thirty-eight".