1405489509 has 16 divisors (see below), whose sum is σ = 2083331200. Its totient is φ = 936487008.

The previous prime is 1405489483. The next prime is 1405489531. The reversal of 1405489509 is 9059845041.

1405489509 is a `hidden beast` number, since 14 + 0 + 54 + 89 + 509 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1405489509 is a prime.

It is a super-2 number, since 2×1405489509² = 3950801519818122162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405489559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40752 + ... + 66870.

It is an arithmetic number, because the mean of its divisors is an integer number (130208200).

Almost surely, 2^1405489509 is an apocalyptic number.

It is an amenable number.

1405489509 is a deficient number, since it is larger than the sum of its proper divisors (677841691).

1405489509 is a wasteful number, since it uses less digits than its factorization.

1405489509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28121 (or 28115 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 1405489509 is about 37489.8587487336. The cubic root of 1405489509 is about 1120.1491906384.

It can be divided in two parts, 140 and 5489509, that added together give a square (5489649 = 2343²).

The spelling of 1405489509 in words is "one billion, four hundred five million, four hundred eighty-nine thousand, five hundred nine".