428887772870 has 16 divisors (see below), whose sum is σ = 774784992528. Its totient is φ = 170935775520.

The previous prime is 428887772851. The next prime is 428887772899. The reversal of 428887772870 is 78277788824.

It is a self number, because there is not a number n which added to its sum of digits gives 428887772870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77413796 + ... + 77419335.

It is an arithmetic number, because the mean of its divisors is an integer number (48424062033).

Almost surely, 2^428887772870 is an apocalyptic number.

428887772870 is a deficient number, since it is larger than the sum of its proper divisors (345897219658).

428887772870 is a wasteful number, since it uses less digits than its factorization.

428887772870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154833415.

The product of its (nonzero) digits is 157351936, while the sum is 68.

The spelling of 428887772870 in words is "four hundred twenty-eight billion, eight hundred eighty-seven million, seven hundred seventy-two thousand, eight hundred seventy".