1540281630 has 32 divisors (see below), whose sum is σ = 3741220224. Its totient is φ = 405792416.

The previous prime is 1540281619. The next prime is 1540281637. The reversal of 1540281630 is 361820451.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540281637) by changing a digit.

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, 306804 + ... + 311783.

It is an arithmetic number, because the mean of its divisors is an integer number (116913132).

Almost surely, 2^1540281630 is an apocalyptic number.

1540281630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1540281630 is an abundant number, since it is smaller than the sum of its proper divisors (2200938594).

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

1540281630 is a wasteful number, since it uses less digits than its factorization.

1540281630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618680.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1540281630 is about 39246.4218751213. The cubic root of 1540281630 is about 1154.8707413303.

The spelling of 1540281630 in words is "one billion, five hundred forty million, two hundred eighty-one thousand, six hundred thirty".