1228339392 has 56 divisors (see below), whose sum is σ = 3714268416. Its totient is φ = 350953728.

The previous prime is 1228339373. The next prime is 1228339393. The reversal of 1228339392 is 2939338221.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1228339393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455628 + ... + 458315.

Almost surely, 2^1228339392 is an apocalyptic number.

1228339392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1228339392 is an abundant number, since it is smaller than the sum of its proper divisors (2485929024).

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

1228339392 is an equidigital number, since it uses as much as digits as its factorization.

1228339392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913965 (or 913955 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 1228339392 is about 35047.6731324634. The cubic root of 1228339392 is about 1070.9588726022.

The spelling of 1228339392 in words is "one billion, two hundred twenty-eight million, three hundred thirty-nine thousand, three hundred ninety-two".