1198862780 has 48 divisors (see below), whose sum is σ = 2670597216. Its totient is φ = 450508800.

The previous prime is 1198862759. The next prime is 1198862801. The reversal of 1198862780 is 872688911.

It is an interprime number because it is at equal distance from previous prime (1198862759) and next prime (1198862801).

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201407 + ... + 207273.

It is an arithmetic number, because the mean of its divisors is an integer number (55637442).

Almost surely, 2^1198862780 is an apocalyptic number.

1198862780 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 1198862780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1335298608).

1198862780 is an abundant number, since it is smaller than the sum of its proper divisors (1471734436).

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

1198862780 is a wasteful number, since it uses less digits than its factorization.

1198862780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494 (or 6492 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 50.

The square root of 1198862780 is about 34624.5979038024. The cubic root of 1198862780 is about 1062.3227751464.

The spelling of 1198862780 in words is "one billion, one hundred ninety-eight million, eight hundred sixty-two thousand, seven hundred eighty".