1223899960 has 32 divisors (see below), whose sum is σ = 2779048800. Its totient is φ = 485066880.

The previous prime is 1223899951. The next prime is 1223899967. The reversal of 1223899960 is 699983221.

It is a super-2 number, since 2×1223899960² = 2995862224176003200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223899967) 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, 135996 + ... + 144715.

It is an arithmetic number, because the mean of its divisors is an integer number (86845275).

Almost surely, 2^1223899960 is an apocalyptic number.

1223899960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223899960 is an abundant number, since it is smaller than the sum of its proper divisors (1555148840).

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

1223899960 is a wasteful number, since it uses less digits than its factorization.

1223899960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280831 (or 280827 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 1223899960 is about 34984.2816133189. The cubic root of 1223899960 is about 1069.6671046400.

The spelling of 1223899960 in words is "one billion, two hundred twenty-three million, eight hundred ninety-nine thousand, nine hundred sixty".