1414665640 has 128 divisors (see below), whose sum is σ = 3374784000. Its totient is φ = 533145600.

The previous prime is 1414665631. The next prime is 1414665641. The reversal of 1414665640 is 465664141.

It is a self number, because there is not a number n which added to its sum of digits gives 1414665640.

It is not an unprimeable number, because it can be changed into a prime (1414665641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7903071 + ... + 7903249.

It is an arithmetic number, because the mean of its divisors is an integer number (26365500).

Almost surely, 2^1414665640 is an apocalyptic number.

1414665640 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 1414665640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1687392000).

1414665640 is an abundant number, since it is smaller than the sum of its proper divisors (1960118360).

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

1414665640 is a wasteful number, since it uses less digits than its factorization.

1414665640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 1414665640 is about 37612.0411570550. The cubic root of 1414665640 is about 1122.5816403172.

The spelling of 1414665640 in words is "one billion, four hundred fourteen million, six hundred sixty-five thousand, six hundred forty".