1418721860 has 24 divisors (see below), whose sum is σ = 2980173336. Its totient is φ = 567325440.

The previous prime is 1418721853. The next prime is 1418721869. The reversal of 1418721860 is 681278141.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 207821056 + 1210900804 = 14416^2 + 34798^2 .

It is not an unprimeable number, because it can be changed into a prime (1418721869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80834 + ... + 96806.

It is an arithmetic number, because the mean of its divisors is an integer number (124173889).

Almost surely, 2^1418721860 is an apocalyptic number.

1418721860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1418721860 is an abundant number, since it is smaller than the sum of its proper divisors (1561451476).

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

1418721860 is a wasteful number, since it uses less digits than its factorization.

1418721860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20423 (or 20421 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 1418721860 is about 37665.9243879664. The cubic root of 1418721860 is about 1123.6535291842.

The spelling of 1418721860 in words is "one billion, four hundred eighteen million, seven hundred twenty-one thousand, eight hundred sixty".