628392450 has 96 divisors (see below), whose sum is σ = 1785885696. Its totient is φ = 143242560.

The previous prime is 628392439. The next prime is 628392463. The reversal of 628392450 is 54293826.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 628392399 and 628392408.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 590619 + ... + 591681.

It is an arithmetic number, because the mean of its divisors is an integer number (18602976).

Almost surely, 2^628392450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628392450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (892942848).

628392450 is an abundant number, since it is smaller than the sum of its proper divisors (1157493246).

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

628392450 is a wasteful number, since it uses less digits than its factorization.

628392450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648 (or 1643 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 628392450 is about 25067.7571792931. The cubic root of 628392450 is about 856.5321183075.

The spelling of 628392450 in words is "six hundred twenty-eight million, three hundred ninety-two thousand, four hundred fifty".