1438240860 has 240 divisors, whose sum is σ = 5255845056. Its totient is φ = 322403328.

The previous prime is 1438240847. The next prime is 1438240871. The reversal of 1438240860 is 680428341.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 599824 + ... + 602216.

Almost surely, 2^1438240860 is an apocalyptic number.

1438240860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438240860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2627922528).

1438240860 is an abundant number, since it is smaller than the sum of its proper divisors (3817604196).

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

1438240860 is a wasteful number, since it uses less digits than its factorization.

1438240860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 2463 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 1438240860 is about 37924.1461340925. The cubic root of 1438240860 is about 1128.7832100250.

The spelling of 1438240860 in words is "one billion, four hundred thirty-eight million, two hundred forty thousand, eight hundred sixty".