1540228128 has 48 divisors (see below), whose sum is σ = 4046093856. Its totient is φ = 513029120.

The previous prime is 1540228073. The next prime is 1540228171. The reversal of 1540228128 is 8218220451.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143923 + ... + 154253.

It is an arithmetic number, because the mean of its divisors is an integer number (84293622).

Almost surely, 2^1540228128 is an apocalyptic number.

It is an amenable number.

1540228128 is an abundant number, since it is smaller than the sum of its proper divisors (2505865728).

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

1540228128 is a wasteful number, since it uses less digits than its factorization.

1540228128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11897 (or 11889 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 1540228128 is about 39245.7402529243. The cubic root of 1540228128 is about 1154.8573696177.

Adding to 1540228128 its reverse (8218220451), we get a palindrome (9758448579).

The spelling of 1540228128 in words is "one billion, five hundred forty million, two hundred twenty-eight thousand, one hundred twenty-eight".