628023814 has 16 divisors (see below), whose sum is σ = 1052742096. Its totient is φ = 278502400.

The previous prime is 628023793. The next prime is 628023821. The reversal of 628023814 is 418320826.

It is a super-2 number, since 2×628023814² = 788827821902213192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 628023814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347227 + ... + 349030.

It is an arithmetic number, because the mean of its divisors is an integer number (65796381).

Almost surely, 2^628023814 is an apocalyptic number.

628023814 is a deficient number, since it is larger than the sum of its proper divisors (424718282).

628023814 is a wasteful number, since it uses less digits than its factorization.

628023814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696311.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 628023814 is about 25060.4033088057. The cubic root of 628023814 is about 856.3645954285.

The spelling of 628023814 in words is "six hundred twenty-eight million, twenty-three thousand, eight hundred fourteen".