1550461440 has 160 divisors (see below), whose sum is σ = 5407528896. Its totient is φ = 375848960.

The previous prime is 1550461439. The next prime is 1550461457. The reversal of 1550461440 is 441640551.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1550461398 and 1550461407.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 75304 + ... + 93656.

Almost surely, 2^1550461440 is an apocalyptic number.

1550461440 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 1550461440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2703764448).

1550461440 is an abundant number, since it is smaller than the sum of its proper divisors (3857067456).

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

1550461440 is a wasteful number, since it uses less digits than its factorization.

1550461440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18390 (or 18374 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1550461440 is about 39375.8992278272. The cubic root of 1550461440 is about 1157.4093593064.

The spelling of 1550461440 in words is "one billion, five hundred fifty million, four hundred sixty-one thousand, four hundred forty".