1015442440 has 16 divisors (see below), whose sum is σ = 2284745580. Its totient is φ = 406176960.

The previous prime is 1015442437. The next prime is 1015442489. The reversal of 1015442440 is 442445101.

It can be written as a sum of positive squares in 2 ways, for example, as 1015441956 + 484 = 31866^2 + 22^2 .

It is a super-2 number, since 2×1015442440² = 2062246697906307200, which contains 22 as substring.

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, 12692991 + ... + 12693070.

Almost surely, 2^1015442440 is an apocalyptic number.

1015442440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1015442440 is an abundant number, since it is smaller than the sum of its proper divisors (1269303140).

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

1015442440 is a wasteful number, since it uses less digits than its factorization.

1015442440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25386072 (or 25386068 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1015442440 is about 31866.0075943002. The cubic root of 1015442440 is about 1005.1212084531.

Adding to 1015442440 its reverse (442445101), we get a palindrome (1457887541).

The spelling of 1015442440 in words is "one billion, fifteen million, four hundred forty-two thousand, four hundred forty".