1208133640 has 64 divisors (see below), whose sum is σ = 3109829760. Its totient is φ = 413790720.

The previous prime is 1208133629. The next prime is 1208133653. The reversal of 1208133640 is 463318021.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1208133599 and 1208133608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399735 + ... + 402745.

It is an arithmetic number, because the mean of its divisors is an integer number (48591090).

Almost surely, 2^1208133640 is an apocalyptic number.

1208133640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1208133640 is an abundant number, since it is smaller than the sum of its proper divisors (1901696120).

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

1208133640 is a wasteful number, since it uses less digits than its factorization.

1208133640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462 (or 4458 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1208133640 is about 34758.2168702596. The cubic root of 1208133640 is about 1065.0540767651.

The spelling of 1208133640 in words is "one billion, two hundred eight million, one hundred thirty-three thousand, six hundred forty".