1202112978 has 72 divisors (see below), whose sum is σ = 2732243472. Its totient is φ = 352321200.

The previous prime is 1202112971. The next prime is 1202112983. The reversal of 1202112978 is 8792112021.

It is a super-2 number, since 2×1202112978² = 2890151223752056968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1202112971) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 696825 + ... + 698547.

It is an arithmetic number, because the mean of its divisors is an integer number (37947826).

Almost surely, 2^1202112978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1202112978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1366121736).

1202112978 is an abundant number, since it is smaller than the sum of its proper divisors (1530130494).

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

1202112978 is a wasteful number, since it uses less digits than its factorization.

1202112978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 1202112978 is about 34671.5009481851. The cubic root of 1202112978 is about 1063.2819185075.

Adding to 1202112978 its reverse (8792112021), we get a palindrome (9994224999).

The spelling of 1202112978 in words is "one billion, two hundred two million, one hundred twelve thousand, nine hundred seventy-eight".