1015253440 has 28 divisors (see below), whose sum is σ = 2417573016. Its totient is φ = 406101248.

The previous prime is 1015253401. The next prime is 1015253579. The reversal of 1015253440 is 443525101.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1586014 + ... + 1586653.

Almost surely, 2^1015253440 is an apocalyptic number.

1015253440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1015253440 is an abundant number, since it is smaller than the sum of its proper divisors (1402319576).

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

1015253440 is an equidigital number, since it uses as much as digits as its factorization.

1015253440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172684 (or 3172674 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1015253440 is about 31863.0419137910. The cubic root of 1015253440 is about 1005.0588449328.

Adding to 1015253440 its reverse (443525101), we get a palindrome (1458778541).

The spelling of 1015253440 in words is "one billion, fifteen million, two hundred fifty-three thousand, four hundred forty".