628197401 has 4 divisors (see below), whose sum is σ = 676520292. Its totient is φ = 579874512.

The previous prime is 628197301. The next prime is 628197403. The reversal of 628197401 is 104791826.

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 56987401 + 571210000 = 7549^2 + 23900^2 .

It is a cyclic number.

It is not a de Polignac number, because 628197401 - 2¹⁴ = 628181017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628197403) 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, 24161426 + ... + 24161451.

It is an arithmetic number, because the mean of its divisors is an integer number (169130073).

Almost surely, 2^628197401 is an apocalyptic number.

It is an amenable number.

628197401 is a deficient number, since it is larger than the sum of its proper divisors (48322891).

628197401 is a wasteful number, since it uses less digits than its factorization.

628197401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48322890.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 628197401 is about 25063.8664415529. The cubic root of 628197401 is about 856.4434884385.

The spelling of 628197401 in words is "six hundred twenty-eight million, one hundred ninety-seven thousand, four hundred one".