1985408 has 16 divisors (see below), whose sum is σ = 3955560. Its totient is φ = 992640.

The previous prime is 1985407. The next prime is 1985419. The reversal of 1985408 is 8045891.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7628 + ... + 7883.

2^1985408 is an apocalyptic number.

It is an amenable number.

1985408 is a deficient number, since it is larger than the sum of its proper divisors (1970152).

1985408 is an equidigital number, since it uses as much as digits as its factorization.

1985408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15525 (or 15513 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1985408 is about 1409.0450667030. The cubic root of 1985408 is about 125.6849439589.

The spelling of 1985408 in words is "one million, nine hundred eighty-five thousand, four hundred eight".