1406087989 has 8 divisors (see below), whose sum is σ = 1516193280. Its totient is φ = 1299592800.

The previous prime is 1406087983. The next prime is 1406088007. The reversal of 1406087989 is 9897806041.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1406087989 - 2³ = 1406087981 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901717 + ... + 903274.

It is an arithmetic number, because the mean of its divisors is an integer number (189524160).

Almost surely, 2^1406087989 is an apocalyptic number.

1406087989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1406087989 is a deficient number, since it is larger than the sum of its proper divisors (110105291).

1406087989 is a wasteful number, since it uses less digits than its factorization.

1406087989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805051.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 1406087989 is about 37497.8397911133. The cubic root of 1406087989 is about 1120.3081605802.

The spelling of 1406087989 in words is "one billion, four hundred six million, eighty-seven thousand, nine hundred eighty-nine".