1520200040 has 16 divisors (see below), whose sum is σ = 3420450180. Its totient is φ = 608080000.

The previous prime is 1520200021. The next prime is 1520200043. The reversal of 1520200040 is 400020251.

It can be written as a sum of positive squares in 2 ways, for example, as 1504974436 + 15225604 = 38794^2 + 3902^2 .

It is a super-2 number, since 2×1520200040² = 4622016323232003200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1520199988 and 1520200024.

It is not an unprimeable number, because it can be changed into a prime (1520200043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19002461 + ... + 19002540.

Almost surely, 2^1520200040 is an apocalyptic number.

1520200040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520200040 is an abundant number, since it is smaller than the sum of its proper divisors (1900250140).

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

1520200040 is a wasteful number, since it uses less digits than its factorization.

1520200040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38005012 (or 38005008 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1520200040 is about 38989.7427537038. The cubic root of 1520200040 is about 1149.8298525840.

Adding to 1520200040 its reverse (400020251), we get a palindrome (1920220291).

The spelling of 1520200040 in words is "one billion, five hundred twenty million, two hundred thousand, forty".