628234131 has 32 divisors (see below), whose sum is σ = 974043648. Its totient is φ = 352753920.

The previous prime is 628234091. The next prime is 628234147. The reversal of 628234131 is 131432826.

628234131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 628234131 - 2¹¹ = 628232083 is a prime.

It is a super-2 number, since 2×628234131² = 789356246706650322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628234151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531361 + ... + 532541.

It is an arithmetic number, because the mean of its divisors is an integer number (30438864).

Almost surely, 2^628234131 is an apocalyptic number.

628234131 is a deficient number, since it is larger than the sum of its proper divisors (345809517).

628234131 is a wasteful number, since it uses less digits than its factorization.

628234131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611.

The product of its digits is 6912, while the sum is 30.

The square root of 628234131 is about 25064.5991589732. The cubic root of 628234131 is about 856.4601798777.

Adding to 628234131 its reverse (131432826), we get a palindrome (759666957).

The spelling of 628234131 in words is "six hundred twenty-eight million, two hundred thirty-four thousand, one hundred thirty-one".