628304742 has 128 divisors (see below), whose sum is σ = 1557964800. Its totient is φ = 186478848.

The previous prime is 628304723. The next prime is 628304753. The reversal of 628304742 is 247403826.

It is a junction number, because it is equal to n+sod(n) for n = 628304697 and 628304706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4520109 + ... + 4520247.

It is an arithmetic number, because the mean of its divisors is an integer number (12171600).

Almost surely, 2^628304742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628304742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778982400).

628304742 is an abundant number, since it is smaller than the sum of its proper divisors (929660058).

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

628304742 is a wasteful number, since it uses less digits than its factorization.

628304742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 628304742 is about 25066.0076996717. The cubic root of 628304742 is about 856.4922662402.

The spelling of 628304742 in words is "six hundred twenty-eight million, three hundred four thousand, seven hundred forty-two".