628999098 has 128 divisors (see below), whose sum is σ = 1610391552. Its totient is φ = 159376896.

The previous prime is 628999097. The next prime is 628999103. The reversal of 628999098 is 890999826.

It is not an unprimeable number, because it can be changed into a prime (628999093) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1713711 + ... + 1714077.

It is an arithmetic number, because the mean of its divisors is an integer number (12581184).

Almost surely, 2^628999098 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628999098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (805195776).

628999098 is an abundant number, since it is smaller than the sum of its proper divisors (981392454).

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

628999098 is a wasteful number, since it uses less digits than its factorization.

628999098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508.

The product of its (nonzero) digits is 5038848, while the sum is 60.

The square root of 628999098 is about 25079.8544254148. The cubic root of 628999098 is about 856.8076607518.

The spelling of 628999098 in words is "six hundred twenty-eight million, nine hundred ninety-nine thousand, ninety-eight".