1540047660 has 144 divisors (see below), whose sum is σ = 4604223456. Its totient is φ = 384528384.

The previous prime is 1540047647. The next prime is 1540047661. The reversal of 1540047660 is 667400451.

It is not an unprimeable number, because it can be changed into a prime (1540047661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2100654 + ... + 2101386.

It is an arithmetic number, because the mean of its divisors is an integer number (31973774).

Almost surely, 2^1540047660 is an apocalyptic number.

1540047660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540047660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2302111728).

1540047660 is an abundant number, since it is smaller than the sum of its proper divisors (3064175796).

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

1540047660 is a wasteful number, since it uses less digits than its factorization.

1540047660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1540047660 is about 39243.4409806276. The cubic root of 1540047660 is about 1154.8122631091.

The spelling of 1540047660 in words is "one billion, five hundred forty million, forty-seven thousand, six hundred sixty".