1228913760 has 96 divisors (see below), whose sum is σ = 3892976640. Its totient is φ = 325856768.

The previous prime is 1228913753. The next prime is 1228913767. The reversal of 1228913760 is 673198221.

It is an interprime number because it is at equal distance from previous prime (1228913753) and next prime (1228913767).

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228913767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78769 + ... + 93071.

It is an arithmetic number, because the mean of its divisors is an integer number (40551840).

Almost surely, 2^1228913760 is an apocalyptic number.

1228913760 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 1228913760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1946488320).

1228913760 is an abundant number, since it is smaller than the sum of its proper divisors (2664062880).

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

1228913760 is a wasteful number, since it uses less digits than its factorization.

1228913760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14500 (or 14492 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1228913760 is about 35055.8662708540. The cubic root of 1228913760 is about 1071.1257723634.

The spelling of 1228913760 in words is "one billion, two hundred twenty-eight million, nine hundred thirteen thousand, seven hundred sixty".