628898357 has 4 divisors (see below), whose sum is σ = 665892396. Its totient is φ = 591904320.

The previous prime is 628898341. The next prime is 628898359. The reversal of 628898357 is 753898826.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 418038916 + 210859441 = 20446^2 + 14521^2 .

It is a cyclic number.

It is not a de Polignac number, because 628898357 - 2⁴ = 628898341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628898359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18496994 + ... + 18497027.

It is an arithmetic number, because the mean of its divisors is an integer number (166473099).

Almost surely, 2^628898357 is an apocalyptic number.

It is an amenable number.

628898357 is a deficient number, since it is larger than the sum of its proper divisors (36994039).

628898357 is a wasteful number, since it uses less digits than its factorization.

628898357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36994038.

The product of its digits is 5806080, while the sum is 56.

The square root of 628898357 is about 25077.8459401919. The cubic root of 628898357 is about 856.7619159755.

The spelling of 628898357 in words is "six hundred twenty-eight million, eight hundred ninety-eight thousand, three hundred fifty-seven".