1198225644 has 48 divisors (see below), whose sum is σ = 3485750016. Its totient is φ = 311227200.

The previous prime is 1198225621. The next prime is 1198225663. The reversal of 1198225644 is 4465228911.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1198225596 and 1198225605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647467 + ... + 649314.

It is an arithmetic number, because the mean of its divisors is an integer number (72619792).

Almost surely, 2^1198225644 is an apocalyptic number.

1198225644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1198225644 is an abundant number, since it is smaller than the sum of its proper divisors (2287524372).

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

1198225644 is a wasteful number, since it uses less digits than its factorization.

1198225644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296806 (or 1296804 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 1198225644 is about 34615.3960543571. The cubic root of 1198225644 is about 1062.1345512081.

The spelling of 1198225644 in words is "one billion, one hundred ninety-eight million, two hundred twenty-five thousand, six hundred forty-four".