1550349840 has 160 divisors (see below), whose sum is σ = 5448401280. Its totient is φ = 361525248.

The previous prime is 1550349797. The next prime is 1550349841. The reversal of 1550349840 is 489430551.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1550349841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46204 + ... + 72356.

It is an arithmetic number, because the mean of its divisors is an integer number (34052508).

Almost surely, 2^1550349840 is an apocalyptic number.

1550349840 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 1550349840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2724200640).

1550349840 is an abundant number, since it is smaller than the sum of its proper divisors (3898051440).

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

1550349840 is a wasteful number, since it uses less digits than its factorization.

1550349840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26201 (or 26195 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 1550349840 is about 39374.4820918320. The cubic root of 1550349840 is about 1157.3815890826.

The spelling of 1550349840 in words is "one billion, five hundred fifty million, three hundred forty-nine thousand, eight hundred forty".