628247187838 has 8 divisors (see below), whose sum is σ = 948152198088. Its totient is φ = 312196455144.

The previous prime is 628247187823. The next prime is 628247187881. The reversal of 628247187838 is 838781742826.

628247187838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×628247187838² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 628247187838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 963568981 + ... + 963569632.

It is an arithmetic number, because the mean of its divisors is an integer number (118519024761).

Almost surely, 2^628247187838 is an apocalyptic number.

628247187838 is a deficient number, since it is larger than the sum of its proper divisors (319905010250).

628247187838 is a wasteful number, since it uses less digits than its factorization.

628247187838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927138778.

The product of its digits is 57802752, while the sum is 64.

The spelling of 628247187838 in words is "six hundred twenty-eight billion, two hundred forty-seven million, one hundred eighty-seven thousand, eight hundred thirty-eight".