1015105440 has 48 divisors (see below), whose sum is σ = 3197583648. Its totient is φ = 270694656.

The previous prime is 1015105433. The next prime is 1015105477. The reversal of 1015105440 is 445015101.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1056922 + ... + 1057881.

It is an arithmetic number, because the mean of its divisors is an integer number (66616326).

Almost surely, 2^1015105440 is an apocalyptic number.

1015105440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1015105440 is an abundant number, since it is smaller than the sum of its proper divisors (2182478208).

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

1015105440 is a wasteful number, since it uses less digits than its factorization.

1015105440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114821 (or 2114813 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1015105440 is about 31860.7193892417. The cubic root of 1015105440 is about 1005.0100046033.

The spelling of 1015105440 in words is "one billion, fifteen million, one hundred five thousand, four hundred forty".