1520847138 has 16 divisors (see below), whose sum is σ = 3063898080. Its totient is φ = 503248416.

The previous prime is 1520847131. The next prime is 1520847161. The reversal of 1520847138 is 8317480251.

It is a junction number, because it is equal to n+sod(n) for n = 1520847096 and 1520847105.

It is not an unprimeable number, because it can be changed into a prime (1520847131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924268 + ... + 925911.

It is an arithmetic number, because the mean of its divisors is an integer number (191493630).

Almost surely, 2^1520847138 is an apocalyptic number.

1520847138 is an abundant number, since it is smaller than the sum of its proper divisors (1543050942).

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

1520847138 is a wasteful number, since it uses less digits than its factorization.

1520847138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850321.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 1520847138 is about 38998.0401815271. The cubic root of 1520847138 is about 1149.9929773988.

The spelling of 1520847138 in words is "one billion, five hundred twenty million, eight hundred forty-seven thousand, one hundred thirty-eight".