628220910 has 32 divisors (see below), whose sum is σ = 1559723040. Its totient is φ = 161748608.

The previous prime is 628220903. The next prime is 628220917. The reversal of 628220910 is 19022826.

It is an interprime number because it is at equal distance from previous prime (628220903) and next prime (628220917).

It is a super-2 number, since 2×628220910² = 789323023522456200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628220917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360177 + ... + 361916.

It is an arithmetic number, because the mean of its divisors is an integer number (48741345).

Almost surely, 2^628220910 is an apocalyptic number.

628220910 is an abundant number, since it is smaller than the sum of its proper divisors (931502130).

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

628220910 is a wasteful number, since it uses less digits than its factorization.

628220910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722132.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 628220910 is about 25064.3354190770. The cubic root of 628220910 is about 856.4541718525.

The spelling of 628220910 in words is "six hundred twenty-eight million, two hundred twenty thousand, nine hundred ten".