308402228 has 12 divisors (see below), whose sum is σ = 543954432. Its totient is φ = 152986680.

The previous prime is 308402221. The next prime is 308402261. The reversal of 308402228 is 822204803.

It is a super-2 number, since 2×308402228² = 190223868470727968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 308402228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308402221) 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, 303038 + ... + 304053.

It is an arithmetic number, because the mean of its divisors is an integer number (45329536).

Almost surely, 2^308402228 is an apocalyptic number.

It is an amenable number.

308402228 is a deficient number, since it is larger than the sum of its proper divisors (235552204).

308402228 is a wasteful number, since it uses less digits than its factorization.

308402228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607222 (or 607220 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 308402228 is about 17561.3845695606. The cubic root of 308402228 is about 675.6251934159.

The spelling of 308402228 in words is "three hundred eight million, four hundred two thousand, two hundred twenty-eight".