1520612240 has 80 divisors (see below), whose sum is σ = 4046740992. Its totient is φ = 520545792.

The previous prime is 1520612227. The next prime is 1520612257. The reversal of 1520612240 is 422160251.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444617 + ... + 448023.

Almost surely, 2^1520612240 is an apocalyptic number.

1520612240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520612240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2023370496).

1520612240 is an abundant number, since it is smaller than the sum of its proper divisors (2526128752).

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

1520612240 is a wasteful number, since it uses less digits than its factorization.

1520612240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224 (or 4218 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1520612240 is about 38995.0284010667. The cubic root of 1520612240 is about 1149.9337680822.

Adding to 1520612240 its reverse (422160251), we get a palindrome (1942772491).

The spelling of 1520612240 in words is "one billion, five hundred twenty million, six hundred twelve thousand, two hundred forty".