1550440812 has 24 divisors (see below), whose sum is σ = 3808100800. Its totient is φ = 489612816.

The previous prime is 1550440811. The next prime is 1550440819. The reversal of 1550440812 is 2180440551.

It is a self number, because there is not a number n which added to its sum of digits gives 1550440812.

It is not an unprimeable number, because it can be changed into a prime (1550440811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3399862 + ... + 3400317.

Almost surely, 2^1550440812 is an apocalyptic number.

1550440812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1550440812 is an abundant number, since it is smaller than the sum of its proper divisors (2257659988).

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

1550440812 is a wasteful number, since it uses less digits than its factorization.

1550440812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800205 (or 6800203 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 1550440812 is about 39375.6372900808. The cubic root of 1550440812 is about 1157.4042263944.

The spelling of 1550440812 in words is "one billion, five hundred fifty million, four hundred forty thousand, eight hundred twelve".