149440 has 28 divisors (see below), whose sum is σ = 356616. Its totient is φ = 59648.

The previous prime is 149423. The next prime is 149441. The reversal of 149440 is 44941.

It is a happy number.

149440 is nontrivially palindromic in base 13.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87 + ... + 553.

2¹⁴⁹⁴⁴⁰ is an apocalyptic number.

149440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178308).

149440 is an abundant number, since it is smaller than the sum of its proper divisors (207176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149440 is an equidigital number, since it uses as much as digits as its factorization.

149440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 149440 is about 386.5747017072. The cubic root of 149440 is about 53.0667250265.

The spelling of 149440 in words is "one hundred forty-nine thousand, four hundred forty".