428914691550 has 288 divisors, whose sum is σ = 1271861809920. Its totient is φ = 103145011200.

The previous prime is 428914691509. The next prime is 428914691587. The reversal of 428914691550 is 55196419824.

428914691550 is a `hidden beast` number, since 4 + 2 + 89 + 1 + 4 + 6 + 9 + 1 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 41487982 + ... + 41498318.

It is an arithmetic number, because the mean of its divisors is an integer number (4416186840).

Almost surely, 2^428914691550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428914691550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635930904960).

428914691550 is an abundant number, since it is smaller than the sum of its proper divisors (842947118370).

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

428914691550 is a wasteful number, since it uses less digits than its factorization.

428914691550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10608 (or 10600 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 428914691550 in words is "four hundred twenty-eight billion, nine hundred fourteen million, six hundred ninety-one thousand, five hundred fifty".