85440149 has 8 divisors (see below), whose sum is σ = 86974272. Its totient is φ = 83916000.

The previous prime is 85440137. The next prime is 85440151. The reversal of 85440149 is 94104458.

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 85440149 - 2⁴ = 85440133 is a prime.

It is a super-2 number, since 2×85440149² = 14600038122284402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85440109) 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, 15992 + ... + 20654.

It is an arithmetic number, because the mean of its divisors is an integer number (10871784).

Almost surely, 2^85440149 is an apocalyptic number.

It is an amenable number.

85440149 is a deficient number, since it is larger than the sum of its proper divisors (1534123).

85440149 is a wasteful number, since it uses less digits than its factorization.

85440149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4987.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 85440149 is about 9243.3840664553. The cubic root of 85440149 is about 440.4405865714.

The spelling of 85440149 in words is "eighty-five million, four hundred forty thousand, one hundred forty-nine".