1438658252 has 24 divisors (see below), whose sum is σ = 2666923056. Its totient is φ = 676717568.

The previous prime is 1438658251. The next prime is 1438658281. The reversal of 1438658252 is 2528568341.

It is not an unprimeable number, because it can be changed into a prime (1438658251) 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, 264068 + ... + 269460.

It is an arithmetic number, because the mean of its divisors is an integer number (111121794).

Almost surely, 2^1438658252 is an apocalyptic number.

It is an amenable number.

1438658252 is a deficient number, since it is larger than the sum of its proper divisors (1228264804).

1438658252 is a wasteful number, since it uses less digits than its factorization.

1438658252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9337 (or 9335 counting only the distinct ones).

The product of its digits is 460800, while the sum is 44.

The square root of 1438658252 is about 37929.6487197021. The cubic root of 1438658252 is about 1128.8923942201.

The spelling of 1438658252 in words is "one billion, four hundred thirty-eight million, six hundred fifty-eight thousand, two hundred fifty-two".