628915623 has 8 divisors (see below), whose sum is σ = 958347648. Its totient is φ = 359380344.

The previous prime is 628915621. The next prime is 628915627. The reversal of 628915623 is 326519826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 628915623 - 2¹ = 628915621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628915621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14974161 + ... + 14974202.

It is an arithmetic number, because the mean of its divisors is an integer number (119793456).

Almost surely, 2^628915623 is an apocalyptic number.

628915623 is a deficient number, since it is larger than the sum of its proper divisors (329432025).

628915623 is a wasteful number, since it uses less digits than its factorization.

628915623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29948373.

The product of its digits is 155520, while the sum is 42.

The square root of 628915623 is about 25078.1901858966. The cubic root of 628915623 is about 856.7697565196.

It can be divided in two parts, 6289 and 15623, that added together give a palindrome (21912).

The spelling of 628915623 in words is "six hundred twenty-eight million, nine hundred fifteen thousand, six hundred twenty-three".