1438213900 has 36 divisors (see below), whose sum is σ = 3125190600. Its totient is φ = 574499200.

The previous prime is 1438213871. The next prime is 1438213927. The reversal of 1438213900 is 93128341.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66651 + ... + 85549.

It is an arithmetic number, because the mean of its divisors is an integer number (86810850).

Almost surely, 2^1438213900 is an apocalyptic number.

1438213900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438213900 is an abundant number, since it is smaller than the sum of its proper divisors (1686976700).

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

1438213900 is a wasteful number, since it uses less digits than its factorization.

1438213900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19674 (or 19667 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1438213900 is about 37923.7906860588. The cubic root of 1438213900 is about 1128.7761569213.

It can be divided in two parts, 14382 and 13900, that added together give a palindrome (28282).

The spelling of 1438213900 in words is "one billion, four hundred thirty-eight million, two hundred thirteen thousand, nine hundred".