1198621240 has 32 divisors (see below), whose sum is σ = 2724709680. Its totient is φ = 474504192.

The previous prime is 1198621217. The next prime is 1198621273. The reversal of 1198621240 is 421268911.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1198621196 and 1198621205.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 150582 + ... + 158341.

Almost surely, 2^1198621240 is an apocalyptic number.

1198621240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1198621240 is an abundant number, since it is smaller than the sum of its proper divisors (1526088440).

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

1198621240 is a wasteful number, since it uses less digits than its factorization.

1198621240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309031 (or 309027 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 1198621240 is about 34621.1097453562. The cubic root of 1198621240 is about 1062.2514267871.

The spelling of 1198621240 in words is "one billion, one hundred ninety-eight million, six hundred twenty-one thousand, two hundred forty".