628228854 has 72 divisors (see below), whose sum is σ = 1561328496. Its totient is φ = 182080800.

The previous prime is 628228847. The next prime is 628228859. The reversal of 628228854 is 458822826.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628228859) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 43824 + ... + 56364.

It is an arithmetic number, because the mean of its divisors is an integer number (21685118).

Almost surely, 2^628228854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628228854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780664248).

628228854 is an abundant number, since it is smaller than the sum of its proper divisors (933099642).

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

628228854 is a wasteful number, since it uses less digits than its factorization.

628228854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12594 (or 12580 counting only the distinct ones).

The product of its digits is 491520, while the sum is 45.

The square root of 628228854 is about 25064.4938907611. The cubic root of 628228854 is about 856.4577818583.

The spelling of 628228854 in words is "six hundred twenty-eight million, two hundred twenty-eight thousand, eight hundred fifty-four".