1550353920 has 160 divisors (see below), whose sum is σ = 5127930720. Its totient is φ = 399114240.

The previous prime is 1550353901. The next prime is 1550353921. The reversal of 1550353920 is 293530551.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550353921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219240 + ... + 226200.

It is an arithmetic number, because the mean of its divisors is an integer number (32049567).

Almost surely, 2^1550353920 is an apocalyptic number.

1550353920 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 1550353920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2563965360).

1550353920 is an abundant number, since it is smaller than the sum of its proper divisors (3577576800).

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

1550353920 is an equidigital number, since it uses as much as digits as its factorization.

1550353920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7016 (or 7000 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 33.

The square root of 1550353920 is about 39374.5339020032. The cubic root of 1550353920 is about 1157.3826043615.

The spelling of 1550353920 in words is "one billion, five hundred fifty million, three hundred fifty-three thousand, nine hundred twenty".