1438650900 has 54 divisors (see below), whose sum is σ = 4509374142. Its totient is φ = 383640000.

The previous prime is 1438650893. The next prime is 1438650907. The reversal of 1438650900 is 90568341.

1438650900 is a `hidden beast` number, since 143 + 8 + 6 + 509 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1438650893) and next prime (1438650907).

It can be written as a sum of positive squares in 3 ways, for example, as 41835024 + 1396815876 = 6468^2 + 37374^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438650907) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 798351 + ... + 800150.

Almost surely, 2^1438650900 is an apocalyptic number.

1438650900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438650900 is an abundant number, since it is smaller than the sum of its proper divisors (3070723242).

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

1438650900 is a wasteful number, since it uses less digits than its factorization.

1438650900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598521 (or 1598511 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1438650900 is about 37929.5518033103. The cubic root of 1438650900 is about 1128.8904712174.

The spelling of 1438650900 in words is "one billion, four hundred thirty-eight million, six hundred fifty thousand, nine hundred".