1015164440 has 64 divisors (see below), whose sum is σ = 2396632320. Its totient is φ = 386496000.

The previous prime is 1015164439. The next prime is 1015164463. The reversal of 1015164440 is 444615101.

It is a congruent number.

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, 68930 + ... + 82350.

It is an arithmetic number, because the mean of its divisors is an integer number (37447380).

Almost surely, 2^1015164440 is an apocalyptic number.

1015164440 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 1015164440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1198316160).

1015164440 is an abundant number, since it is smaller than the sum of its proper divisors (1381467880).

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

1015164440 is a wasteful number, since it uses less digits than its factorization.

1015164440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13524 (or 13520 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1015164440 is about 31861.6452808075. The cubic root of 1015164440 is about 1005.0294753036.

Adding to 1015164440 its reverse (444615101), we get a palindrome (1459779541).

The spelling of 1015164440 in words is "one billion, fifteen million, one hundred sixty-four thousand, four hundred forty".