228013440 has 64 divisors (see below), whose sum is σ = 726798960. Its totient is φ = 60803072.

The previous prime is 228013427. The next prime is 228013441. The reversal of 228013440 is 44310822.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 228013440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228013441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57459 + ... + 61298.

Almost surely, 2^228013440 is an apocalyptic number.

228013440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228013440 is an abundant number, since it is smaller than the sum of its proper divisors (498785520).

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

228013440 is a wasteful number, since it uses less digits than its factorization.

228013440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118779 (or 118767 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 228013440 is about 15100.1139068551. The cubic root of 228013440 is about 610.9234780677.

The spelling of 228013440 in words is "two hundred twenty-eight million, thirteen thousand, four hundred forty".