1047438440 has 16 divisors (see below), whose sum is σ = 2356736580. Its totient is φ = 418975360.

The previous prime is 1047438437. The next prime is 1047438449. The reversal of 1047438440 is 448347401.

It can be written as a sum of positive squares in 2 ways, for example, as 1008824644 + 38613796 = 31762^2 + 6214^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1047438440.

It is not an unprimeable number, because it can be changed into a prime (1047438449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13092941 + ... + 13093020.

Almost surely, 2^1047438440 is an apocalyptic number.

1047438440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1047438440 is an abundant number, since it is smaller than the sum of its proper divisors (1309298140).

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

1047438440 is a wasteful number, since it uses less digits than its factorization.

1047438440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26185972 (or 26185968 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 1047438440 is about 32364.1536271227. The cubic root of 1047438440 is about 1015.5691567118.

The spelling of 1047438440 in words is "one billion, forty-seven million, four hundred thirty-eight thousand, four hundred forty".