1197420840 has 768 divisors, whose sum is σ = 5407430400. Its totient is φ = 234178560.

The previous prime is 1197420803. The next prime is 1197420919. The reversal of 1197420840 is 480247911.

1197420840 is a `hidden beast` number, since 1 + 197 + 420 + 8 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1197420795 and 1197420804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 70436512 + ... + 70436528.

It is an arithmetic number, because the mean of its divisors is an integer number (7040925).

Almost surely, 2^1197420840 is an apocalyptic number.

1197420840 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 1197420840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2703715200).

1197420840 is an abundant number, since it is smaller than the sum of its proper divisors (4210009560).

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

1197420840 is a wasteful number, since it uses less digits than its factorization.

1197420840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1197420840 is about 34603.7691588648. The cubic root of 1197420840 is about 1061.8966990716.

The spelling of 1197420840 in words is "one billion, one hundred ninety-seven million, four hundred twenty thousand, eight hundred forty".