1514322640 has 20 divisors (see below), whose sum is σ = 3520800324. Its totient is φ = 605729024.

The previous prime is 1514322587. The next prime is 1514322647. The reversal of 1514322640 is 462234151.

It can be written as a sum of positive squares in 2 ways, for example, as 434805904 + 1079516736 = 20852^2 + 32856^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1514322599 and 1514322608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1514322647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9464437 + ... + 9464596.

Almost surely, 2^1514322640 is an apocalyptic number.

1514322640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1514322640 is an abundant number, since it is smaller than the sum of its proper divisors (2006477684).

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

1514322640 is a wasteful number, since it uses less digits than its factorization.

1514322640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18929046 (or 18929040 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1514322640 is about 38914.2986574344. The cubic root of 1514322640 is about 1148.3461140783.

Adding to 1514322640 its reverse (462234151), we get a palindrome (1976556791).

The spelling of 1514322640 in words is "one billion, five hundred fourteen million, three hundred twenty-two thousand, six hundred forty".