1406087988 has 12 divisors (see below), whose sum is σ = 3280872000. Its totient is φ = 468695992.

The previous prime is 1406087983. The next prime is 1406088007. The reversal of 1406087988 is 8897806041.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1406087988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406087981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58586988 + ... + 58587011.

It is an arithmetic number, because the mean of its divisors is an integer number (273406000).

Almost surely, 2^1406087988 is an apocalyptic number.

It is an amenable number.

1406087988 is an abundant number, since it is smaller than the sum of its proper divisors (1874784012).

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

1406087988 is a wasteful number, since it uses less digits than its factorization.

1406087988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117174006 (or 117174004 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 51.

The square root of 1406087988 is about 37497.8397777792. The cubic root of 1406087988 is about 1120.3081603146.

The spelling of 1406087988 in words is "one billion, four hundred six million, eighty-seven thousand, nine hundred eighty-eight".