1540440030 has 16 divisors (see below), whose sum is σ = 3697056144. Its totient is φ = 410784000.

The previous prime is 1540440017. The next prime is 1540440043. The reversal of 1540440030 is 300440451.

It is an interprime number because it is at equal distance from previous prime (1540440017) and next prime (1540440043).

It is a junction number, because it is equal to n+sod(n) for n = 1540439979 and 1540440006.

It is a congruent number.

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, 25673971 + ... + 25674030.

It is an arithmetic number, because the mean of its divisors is an integer number (231066009).

Almost surely, 2^1540440030 is an apocalyptic number.

1540440030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1540440030 is an abundant number, since it is smaller than the sum of its proper divisors (2156616114).

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

1540440030 is a wasteful number, since it uses less digits than its factorization.

1540440030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51348011.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1540440030 is about 39248.4398416039. The cubic root of 1540440030 is about 1154.9103283018.

Adding to 1540440030 its reverse (300440451), we get a palindrome (1840880481).

The spelling of 1540440030 in words is "one billion, five hundred forty million, four hundred forty thousand, thirty".