628247730 has 96 divisors (see below), whose sum is σ = 1744747200. Its totient is φ = 144270720.

The previous prime is 628247713. The next prime is 628247773. The reversal of 628247730 is 37742826.

It is a congruent number.

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, 64416 + ... + 73524.

It is an arithmetic number, because the mean of its divisors is an integer number (18174450).

Almost surely, 2^628247730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628247730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (872373600).

628247730 is an abundant number, since it is smaller than the sum of its proper divisors (1116499470).

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

628247730 is a wasteful number, since it uses less digits than its factorization.

628247730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9160 (or 9149 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 628247730 is about 25064.8704365293. The cubic root of 628247730 is about 856.4663595897.

The spelling of 628247730 in words is "six hundred twenty-eight million, two hundred forty-seven thousand, seven hundred thirty".