628443801 has 6 divisors (see below), whose sum is σ = 907752170. Its totient is φ = 418962528.

The previous prime is 628443799. The next prime is 628443821. The reversal of 628443801 is 108344826.

628443801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 532501776 + 95942025 = 23076^2 + 9795^2 .

It is not a de Polignac number, because 628443801 - 2¹ = 628443799 is a prime.

It is a super-2 number, since 2×628443801² = 789883222030655202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628443821) 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, 34913536 + ... + 34913553.

Almost surely, 2^628443801 is an apocalyptic number.

It is an amenable number.

628443801 is a deficient number, since it is larger than the sum of its proper divisors (279308369).

628443801 is a wasteful number, since it uses less digits than its factorization.

628443801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69827095 (or 69827092 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 628443801 is about 25068.7814023738. The cubic root of 628443801 is about 856.5554490475. Note that the first 3 decimals are identical.

The spelling of 628443801 in words is "six hundred twenty-eight million, four hundred forty-three thousand, eight hundred one".