628022705 has 32 divisors (see below), whose sum is σ = 807335424. Its totient is φ = 467923456.

The previous prime is 628022693. The next prime is 628022729. The reversal of 628022705 is 507220826.

It is a cyclic number.

It is not a de Polignac number, because 628022705 - 2⁶ = 628022641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1017557 + ... + 1018173.

It is an arithmetic number, because the mean of its divisors is an integer number (25229232).

Almost surely, 2^628022705 is an apocalyptic number.

It is an amenable number.

628022705 is a deficient number, since it is larger than the sum of its proper divisors (179312719).

628022705 is a wasteful number, since it uses less digits than its factorization.

628022705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 628022705 is about 25060.3811822566. The cubic root of 628022705 is about 856.3640913559.

The spelling of 628022705 in words is "six hundred twenty-eight million, twenty-two thousand, seven hundred five".