1438684900 has 27 divisors (see below), whose sum is σ = 3122769531. Its totient is φ = 575322240.

The previous prime is 1438684853. The next prime is 1438684967. The reversal of 1438684900 is 94868341.

The square root of 1438684900 is 37930.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 315630756 + 1123054144 = 17766^2 + 33512^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 377404 + ... + 381196.

Almost surely, 2^1438684900 is an apocalyptic number.

1438684900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1438684900 is the 37930-th square number.

It is an amenable number.

1438684900 is an abundant number, since it is smaller than the sum of its proper divisors (1684084631).

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

1438684900 is an frugal number, since it uses more digits than its factorization.

1438684900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7600 (or 3800 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The cubic root of 1438684900 is about 1128.8993642652.

The spelling of 1438684900 in words is "one billion, four hundred thirty-eight million, six hundred eighty-four thousand, nine hundred".