1538079940 has 12 divisors (see below), whose sum is σ = 3229967916. Its totient is φ = 615231968.

The previous prime is 1538079901. The next prime is 1538079967. The reversal of 1538079940 is 499708351.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 253000836 + 1285079104 = 15906^2 + 35848^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38451979 + ... + 38452018.

It is an arithmetic number, because the mean of its divisors is an integer number (269163993).

Almost surely, 2^1538079940 is an apocalyptic number.

1538079940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1538079940 is an abundant number, since it is smaller than the sum of its proper divisors (1691887976).

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

1538079940 is a wasteful number, since it uses less digits than its factorization.

1538079940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76904006 (or 76904004 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1538079940 is about 39218.3622809520. The cubic root of 1538079940 is about 1154.3202186687.

The spelling of 1538079940 in words is "one billion, five hundred thirty-eight million, seventy-nine thousand, nine hundred forty".