428726551890 has 64 divisors (see below), whose sum is σ = 1266392284416. Its totient is φ = 90456590592.

The previous prime is 428726551889. The next prime is 428726551927. The reversal of 428726551890 is 98155627824.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 428726551890.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78518617 + ... + 78524076.

It is an arithmetic number, because the mean of its divisors is an integer number (19787379444).

Almost surely, 2^428726551890 is an apocalyptic number.

428726551890 is an abundant number, since it is smaller than the sum of its proper divisors (837665732526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428726551890 is a wasteful number, since it uses less digits than its factorization.

428726551890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157042723.

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 428726551890 in words is "four hundred twenty-eight billion, seven hundred twenty-six million, five hundred fifty-one thousand, eight hundred ninety".