1540479618 has 24 divisors (see below), whose sum is σ = 3379958400. Its totient is φ = 506992824.

The previous prime is 1540479617. The next prime is 1540479641. The reversal of 1540479618 is 8169740451.

1540479618 is a `hidden beast` number, since 1 + 540 + 4 + 7 + 96 + 18 = 666.

It is not an unprimeable number, because it can be changed into a prime (1540479613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 540238 + ... + 543081.

It is an arithmetic number, because the mean of its divisors is an integer number (140831600).

Almost surely, 2^1540479618 is an apocalyptic number.

1540479618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1540479618 is an abundant number, since it is smaller than the sum of its proper divisors (1839478782).

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

1540479618 is a wasteful number, since it uses less digits than its factorization.

1540479618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083406 (or 1083403 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1540479618 is about 39248.9441641428. The cubic root of 1540479618 is about 1154.9202216218.

The spelling of 1540479618 in words is "one billion, five hundred forty million, four hundred seventy-nine thousand, six hundred eighteen".