628240188 has 12 divisors (see below), whose sum is σ = 1465893800. Its totient is φ = 209413392.

The previous prime is 628240183. The next prime is 628240213. The reversal of 628240188 is 881042826.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628240183) 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, 26176663 + ... + 26176686.

Almost surely, 2^628240188 is an apocalyptic number.

It is an amenable number.

628240188 is an abundant number, since it is smaller than the sum of its proper divisors (837653612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628240188 is a wasteful number, since it uses less digits than its factorization.

628240188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52353356 (or 52353354 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 39.

The square root of 628240188 is about 25064.7199864670. The cubic root of 628240188 is about 856.4629323349.

The spelling of 628240188 in words is "six hundred twenty-eight million, two hundred forty thousand, one hundred eighty-eight".