628754297 has 6 divisors (see below), whose sum is σ = 642418938. Its totient is φ = 615374384.

The previous prime is 628754293. The next prime is 628754339. The reversal of 628754297 is 792457826.

It can be written as a sum of positive squares in only one way, i.e., 570063376 + 58690921 = 23876^2 + 7661^2 .

It is not a de Polignac number, because 628754297 - 2² = 628754293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628754293) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140108 + ... + 144525.

It is an arithmetic number, because the mean of its divisors is an integer number (107069823).

Almost surely, 2^628754297 is an apocalyptic number.

It is an amenable number.

628754297 is a deficient number, since it is larger than the sum of its proper divisors (13664641).

628754297 is an equidigital number, since it uses as much as digits as its factorization.

628754297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284727 (or 284680 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The square root of 628754297 is about 25074.9735194277. The cubic root of 628754297 is about 856.6964922889.

The spelling of 628754297 in words is "six hundred twenty-eight million, seven hundred fifty-four thousand, two hundred ninety-seven".