228137629 has 4 divisors (see below), whose sum is σ = 231262876. Its totient is φ = 225012384.

The previous prime is 228137627. The next prime is 228137633. The reversal of 228137629 is 926731822.

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 56475225 + 171662404 = 7515^2 + 13102^2 .

It is a cyclic number.

It is not a de Polignac number, because 228137629 - 2¹ = 228137627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228137591 and 228137600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228137627) 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, 1562514 + ... + 1562659.

It is an arithmetic number, because the mean of its divisors is an integer number (57815719).

Almost surely, 2^228137629 is an apocalyptic number.

It is an amenable number.

228137629 is a deficient number, since it is larger than the sum of its proper divisors (3125247).

228137629 is an equidigital number, since it uses as much as digits as its factorization.

228137629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125246.

The product of its digits is 72576, while the sum is 40.

The square root of 228137629 is about 15104.2255345979. The cubic root of 228137629 is about 611.0343724162.

The spelling of 228137629 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, six hundred twenty-nine".