1228675440 has 80 divisors (see below), whose sum is σ = 3820068000. Its totient is φ = 326685696.

The previous prime is 1228675397. The next prime is 1228675447. The reversal of 1228675440 is 445768221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228675447) 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 15 ways as a sum of consecutive naturals, for example, 76426 + ... + 91094.

It is an arithmetic number, because the mean of its divisors is an integer number (47750850).

Almost surely, 2^1228675440 is an apocalyptic number.

1228675440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228675440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1910034000).

1228675440 is an abundant number, since it is smaller than the sum of its proper divisors (2591392560).

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

1228675440 is a wasteful number, since it uses less digits than its factorization.

1228675440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15034 (or 15028 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 1228675440 is about 35052.4669602583. The cubic root of 1228675440 is about 1071.0565276897.

The spelling of 1228675440 in words is "one billion, two hundred twenty-eight million, six hundred seventy-five thousand, four hundred forty".