1540403550 has 144 divisors (see below), whose sum is σ = 4748758560. Its totient is φ = 350680320.

The previous prime is 1540403539. The next prime is 1540403551. The reversal of 1540403550 is 553040451.

1540403550 is a `hidden beast` number, since 1 + 540 + 40 + 35 + 50 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540403551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 922116 + ... + 923784.

It is an arithmetic number, because the mean of its divisors is an integer number (32977490).

Almost surely, 2^1540403550 is an apocalyptic number.

1540403550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540403550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2374379280).

1540403550 is an abundant number, since it is smaller than the sum of its proper divisors (3208355010).

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

1540403550 is a wasteful number, since it uses less digits than its factorization.

1540403550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987 (or 1979 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 1540403550 is about 39247.9751070039. The cubic root of 1540403550 is about 1154.9012115429.

The spelling of 1540403550 in words is "one billion, five hundred forty million, four hundred three thousand, five hundred fifty".