1208140440 has 192 divisors, whose sum is σ = 4023159840. Its totient is φ = 289935360.

The previous prime is 1208140433. The next prime is 1208140469. The reversal of 1208140440 is 440418021.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1208140440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 830754 + ... + 832206.

Almost surely, 2^1208140440 is an apocalyptic number.

1208140440 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 1208140440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2011579920).

1208140440 is an abundant number, since it is smaller than the sum of its proper divisors (2815019400).

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

1208140440 is a wasteful number, since it uses less digits than its factorization.

1208140440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 1208140440 is about 34758.3146887187. The cubic root of 1208140440 is about 1065.0560749861.

Adding to 1208140440 its reverse (440418021), we get a palindrome (1648558461).

The spelling of 1208140440 in words is "one billion, two hundred eight million, one hundred forty thousand, four hundred forty".