1195977540 has 96 divisors (see below), whose sum is σ = 3563167104. Its totient is φ = 298690560.

The previous prime is 1195977511. The next prime is 1195977571. The reversal of 1195977540 is 457795911.

It is a self number, because there is not a number n which added to its sum of digits gives 1195977540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212442 + ... + 217998.

It is an arithmetic number, because the mean of its divisors is an integer number (37116324).

Almost surely, 2^1195977540 is an apocalyptic number.

1195977540 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 1195977540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1781583552).

1195977540 is an abundant number, since it is smaller than the sum of its proper divisors (2367189564).

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

1195977540 is a wasteful number, since it uses less digits than its factorization.

1195977540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5797 (or 5795 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 48.

The square root of 1195977540 is about 34582.9082062223. The cubic root of 1195977540 is about 1061.4698784557.

The spelling of 1195977540 in words is "one billion, one hundred ninety-five million, nine hundred seventy-seven thousand, five hundred forty".