1015213440 has 128 divisors (see below), whose sum is σ = 3347762400. Its totient is φ = 261373952.

The previous prime is 1015213427. The next prime is 1015213471. The reversal of 1015213440 is 443125101.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 46564 + ... + 64796.

Almost surely, 2^1015213440 is an apocalyptic number.

1015213440 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 1015213440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673881200).

1015213440 is an abundant number, since it is smaller than the sum of its proper divisors (2332548960).

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

1015213440 is a wasteful number, since it uses less digits than its factorization.

1015213440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18284 (or 18272 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1015213440 is about 31862.4142211478. The cubic root of 1015213440 is about 1005.0456453118.

Adding to 1015213440 its reverse (443125101), we get a palindrome (1458338541).

The spelling of 1015213440 in words is "one billion, fifteen million, two hundred thirteen thousand, four hundred forty".