628022720 has 56 divisors (see below), whose sum is σ = 1610526624. Its totient is φ = 231883776.

The previous prime is 628022693. The next prime is 628022729. The reversal of 628022720 is 27220826.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628022729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71324 + ... + 79643.

It is an arithmetic number, because the mean of its divisors is an integer number (28759404).

Almost surely, 2^628022720 is an apocalyptic number.

It is an amenable number.

628022720 is an abundant number, since it is smaller than the sum of its proper divisors (982503904).

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

628022720 is a wasteful number, since it uses less digits than its factorization.

628022720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150997 (or 150987 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 628022720 is about 25060.3814815338. The cubic root of 628022720 is about 856.3640981738.

The spelling of 628022720 in words is "six hundred twenty-eight million, twenty-two thousand, seven hundred twenty".