1438649850 has 96 divisors (see below), whose sum is σ = 3914749440. Its totient is φ = 346744000.

The previous prime is 1438649833. The next prime is 1438649851. The reversal of 1438649850 is 589468341.

It is a self number, because there is not a number n which added to its sum of digits gives 1438649850.

It is not an unprimeable number, because it can be changed into a prime (1438649851) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 292915 + ... + 297785.

It is an arithmetic number, because the mean of its divisors is an integer number (40778640).

Almost surely, 2^1438649850 is an apocalyptic number.

1438649850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438649850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1957374720).

1438649850 is an abundant number, since it is smaller than the sum of its proper divisors (2476099590).

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

1438649850 is a wasteful number, since it uses less digits than its factorization.

1438649850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076 (or 5071 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 1438649850 is about 37929.5379618576. The cubic root of 1438649850 is about 1128.8901965769.

The spelling of 1438649850 in words is "one billion, four hundred thirty-eight million, six hundred forty-nine thousand, eight hundred fifty".