228709437 has 8 divisors (see below), whose sum is σ = 332668320. Its totient is φ = 138611760.

The previous prime is 228709427. The next prime is 228709463. The reversal of 228709437 is 734907822.

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

It is not a de Polignac number, because 228709437 - 2¹² = 228705341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228709427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3465262 + ... + 3465327.

It is an arithmetic number, because the mean of its divisors is an integer number (41583540).

Almost surely, 2^228709437 is an apocalyptic number.

It is an amenable number.

228709437 is a deficient number, since it is larger than the sum of its proper divisors (103958883).

228709437 is a wasteful number, since it uses less digits than its factorization.

228709437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6930603.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 228709437 is about 15123.1424313864. The cubic root of 228709437 is about 611.5444487832.

The spelling of 228709437 in words is "two hundred twenty-eight million, seven hundred nine thousand, four hundred thirty-seven".