1550738940 has 48 divisors (see below), whose sum is σ = 4350786048. Its totient is φ = 412700224.

The previous prime is 1550738933. The next prime is 1550738977. The reversal of 1550738940 is 498370551.

It is a junction number, because it is equal to n+sod(n) for n = 1550738892 and 1550738901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4489 + ... + 55871.

It is an arithmetic number, because the mean of its divisors is an integer number (90641376).

Almost surely, 2^1550738940 is an apocalyptic number.

1550738940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550738940 is an abundant number, since it is smaller than the sum of its proper divisors (2800047108).

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

1550738940 is a wasteful number, since it uses less digits than its factorization.

1550738940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51898 (or 51896 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 1550738940 is about 39379.4227992235. The cubic root of 1550738940 is about 1157.4784058344.

The spelling of 1550738940 in words is "one billion, five hundred fifty million, seven hundred thirty-eight thousand, nine hundred forty".