228020709 has 8 divisors (see below), whose sum is σ = 347460160. Its totient is φ = 130297536.

The previous prime is 228020693. The next prime is 228020719. The reversal of 228020709 is 907020822.

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

It is not a de Polignac number, because 228020709 - 2⁴ = 228020693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228020719) 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, 5429044 + ... + 5429085.

It is an arithmetic number, because the mean of its divisors is an integer number (43432520).

Almost surely, 2^228020709 is an apocalyptic number.

It is an amenable number.

228020709 is a deficient number, since it is larger than the sum of its proper divisors (119439451).

228020709 is a wasteful number, since it uses less digits than its factorization.

228020709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10858139.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 228020709 is about 15100.3545984854. The cubic root of 228020709 is about 610.9299700177.

The spelling of 228020709 in words is "two hundred twenty-eight million, twenty thousand, seven hundred nine".