1223978287600 has 120 divisors (see below), whose sum is σ = 3122997110928. Its totient is φ = 459398860800.

The previous prime is 1223978287573. The next prime is 1223978287613. The reversal of 1223978287600 is 67828793221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1978902 + ... + 2522698.

Almost surely, 2^{1223978287600} is an apocalyptic number.

1223978287600 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 1223978287600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1561498555464).

1223978287600 is an abundant number, since it is smaller than the sum of its proper divisors (1899018823328).

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

1223978287600 is a wasteful number, since it uses less digits than its factorization.

1223978287600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544163 (or 544152 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 1223978287600 in words is "one trillion, two hundred twenty-three billion, nine hundred seventy-eight million, two hundred eighty-seven thousand, six hundred".