1550001408 has 72 divisors (see below), whose sum is σ = 4181925888. Its totient is φ = 509571072.

The previous prime is 1550001407. The next prime is 1550001413. The reversal of 1550001408 is 8041000551.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550001407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42241 + ... + 69887.

It is an arithmetic number, because the mean of its divisors is an integer number (58082304).

Almost surely, 2^1550001408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1550001408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2090962944).

1550001408 is an abundant number, since it is smaller than the sum of its proper divisors (2631924480).

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

1550001408 is an equidigital number, since it uses as much as digits as its factorization.

1550001408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27739 (or 27725 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1550001408 is about 39370.0572516729. The cubic root of 1550001408 is about 1157.2948776866.

Adding to 1550001408 its reverse (8041000551), we get a palindrome (9591001959).

The spelling of 1550001408 in words is "one billion, five hundred fifty million, one thousand, four hundred eight".