1540335728238 has 64 divisors (see below), whose sum is σ = 3407677765632. Its totient is φ = 462019645440.

The previous prime is 1540335728233. The next prime is 1540335728251. The reversal of 1540335728238 is 8328275330451.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540335728233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2672131 + ... + 3197022.

It is an arithmetic number, because the mean of its divisors is an integer number (53244965088).

Almost surely, 2^{1540335728238} is an apocalyptic number.

1540335728238 is an abundant number, since it is smaller than the sum of its proper divisors (1867342037394).

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

1540335728238 is a wasteful number, since it uses less digits than its factorization.

1540335728238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869289.

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 1540335728238 in words is "one trillion, five hundred forty billion, three hundred thirty-five million, seven hundred twenty-eight thousand, two hundred thirty-eight".