1438018850 has 12 divisors (see below), whose sum is σ = 2674715154. Its totient is φ = 575207520.

The previous prime is 1438018849. The next prime is 1438018891. The reversal of 1438018850 is 588108341.

It can be written as a sum of positive squares in 3 ways, for example, as 844657969 + 593360881 = 29063^2 + 24359^2 .

It is a super-3 number, since 3×1438018850³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14380139 + ... + 14380238.

Almost surely, 2^1438018850 is an apocalyptic number.

1438018850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1438018850 is a deficient number, since it is larger than the sum of its proper divisors (1236696304).

1438018850 is a wasteful number, since it uses less digits than its factorization.

1438018850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28760389 (or 28760384 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 1438018850 is about 37921.2189941199. The cubic root of 1438018850 is about 1128.7251265558.

The spelling of 1438018850 in words is "one billion, four hundred thirty-eight million, eighteen thousand, eight hundred fifty".