1438387436 has 24 divisors (see below), whose sum is σ = 2585157120. Its totient is φ = 699942992.

The previous prime is 1438387393. The next prime is 1438387439. The reversal of 1438387436 is 6347838341.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1438387439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12281 + ... + 55023.

It is an arithmetic number, because the mean of its divisors is an integer number (107714880).

Almost surely, 2^1438387436 is an apocalyptic number.

It is an amenable number.

1438387436 is a deficient number, since it is larger than the sum of its proper divisors (1146769684).

1438387436 is a wasteful number, since it uses less digits than its factorization.

1438387436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42973 (or 42971 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 47.

The square root of 1438387436 is about 37926.0785739839. The cubic root of 1438387436 is about 1128.8215547631.

The spelling of 1438387436 in words is "one billion, four hundred thirty-eight million, three hundred eighty-seven thousand, four hundred thirty-six".