1550120340 has 48 divisors (see below), whose sum is σ = 4344988032. Its totient is φ = 412922496.

The previous prime is 1550120329. The next prime is 1550120347. The reversal of 1550120340 is 430210551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550120347) 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, 44662 + ... + 71378.

It is an arithmetic number, because the mean of its divisors is an integer number (90520584).

Almost surely, 2^1550120340 is an apocalyptic number.

1550120340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550120340 is an abundant number, since it is smaller than the sum of its proper divisors (2794867692).

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

1550120340 is a wasteful number, since it uses less digits than its factorization.

1550120340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27696 (or 27694 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1550120340 is about 39371.5676599243. The cubic root of 1550120340 is about 1157.3244767725.

Adding to 1550120340 its reverse (430210551), we get a palindrome (1980330891).

The spelling of 1550120340 in words is "one billion, five hundred fifty million, one hundred twenty thousand, three hundred forty".