1405489936 has 20 divisors (see below), whose sum is σ = 2724606864. Its totient is φ = 702365600.

The previous prime is 1405489933. The next prime is 1405489937. The reversal of 1405489936 is 6399845041.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405489936.

It is not an unprimeable number, because it can be changed into a prime (1405489931) 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, 8151 + ... + 53641.

It is a vampire number, since it can be written as 30896 ⋅ 45491 (with its own digits).

Almost surely, 2^1405489936 is an apocalyptic number.

1405489936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1405489936 is a deficient number, since it is larger than the sum of its proper divisors (1319116928).

1405489936 is a wasteful number, since it uses less digits than its factorization.

1405489936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47430 (or 47424 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 1405489936 is about 37489.8644436066. The cubic root of 1405489936 is about 1120.1493040754.

The spelling of 1405489936 in words is "one billion, four hundred five million, four hundred eighty-nine thousand, nine hundred thirty-six".