228467428 has 24 divisors (see below), whose sum is σ = 467563712. Its totient is φ = 95637024.

The previous prime is 228467399. The next prime is 228467461. The reversal of 228467428 is 824764822.

228467428 is digitally balanced in base 2, base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (43).

228467428 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93675 + ... + 96082.

Almost surely, 2^228467428 is an apocalyptic number.

228467428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

228467428 is an abundant number, since it is smaller than the sum of its proper divisors (239096284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228467428 is a wasteful number, since it uses less digits than its factorization.

228467428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189811 (or 189809 counting only the distinct ones).

The product of its digits is 344064, while the sum is 43.

The square root of 228467428 is about 15115.1390334327. The cubic root of 228467428 is about 611.3286706398.

The spelling of 228467428 in words is "two hundred twenty-eight million, four hundred sixty-seven thousand, four hundred twenty-eight".