1198840956 has 48 divisors (see below), whose sum is σ = 2831635968. Its totient is φ = 394732800.

The previous prime is 1198840913. The next prime is 1198840957. The reversal of 1198840956 is 6590488911.

It is a junction number, because it is equal to n+sod(n) for n = 1198840899 and 1198840908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198840957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447501 + ... + 450171.

It is an arithmetic number, because the mean of its divisors is an integer number (58992416).

Almost surely, 2^1198840956 is an apocalyptic number.

It is an amenable number.

1198840956 is an abundant number, since it is smaller than the sum of its proper divisors (1632795012).

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

1198840956 is a wasteful number, since it uses less digits than its factorization.

1198840956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122 (or 3120 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 51.

The square root of 1198840956 is about 34624.2827506939. The cubic root of 1198840956 is about 1062.3163289617.

The spelling of 1198840956 in words is "one billion, one hundred ninety-eight million, eight hundred forty thousand, nine hundred fifty-six".