1520868040 has 32 divisors (see below), whose sum is σ = 3453943680. Its totient is φ = 602660032.

The previous prime is 1520868023. The next prime is 1520868049. The reversal of 1520868040 is 408680251.

It is a junction number, because it is equal to n+sod(n) for n = 1520867987 and 1520868005.

It is not an unprimeable number, because it can be changed into a prime (1520868049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173392 + ... + 181951.

It is an arithmetic number, because the mean of its divisors is an integer number (107935740).

Almost surely, 2^1520868040 is an apocalyptic number.

1520868040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520868040 is an abundant number, since it is smaller than the sum of its proper divisors (1933075640).

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

1520868040 is a wasteful number, since it uses less digits than its factorization.

1520868040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355461 (or 355457 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 1520868040 is about 38998.3081684321. The cubic root of 1520868040 is about 1149.9982457440.

The spelling of 1520868040 in words is "one billion, five hundred twenty million, eight hundred sixty-eight thousand, forty".