628997026 has 24 divisors (see below), whose sum is σ = 1099328220. Its totient is φ = 269129952.

The previous prime is 628997009. The next prime is 628997029. The reversal of 628997026 is 620799826.

It can be written as a sum of positive squares in 2 ways, for example, as 622752025 + 6245001 = 24955^2 + 2499^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (628997029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59080 + ... + 68908.

Almost surely, 2^628997026 is an apocalyptic number.

628997026 is a deficient number, since it is larger than the sum of its proper divisors (470331194).

628997026 is a wasteful number, since it uses less digits than its factorization.

628997026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10498 (or 10491 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 628997026 is about 25079.8131173261. The cubic root of 628997026 is about 856.8067199410.

The spelling of 628997026 in words is "six hundred twenty-eight million, nine hundred ninety-seven thousand, twenty-six".