149840 has 20 divisors (see below), whose sum is σ = 348564. Its totient is φ = 59904.

The previous prime is 149839. The next prime is 149861. The reversal of 149840 is 48941.

It can be written as a sum of positive squares in 2 ways, for example, as 23104 + 126736 = 152^2 + 356^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857 + ... + 1016.

2¹⁴⁹⁸⁴⁰ is an apocalyptic number.

149840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149840 is an abundant number, since it is smaller than the sum of its proper divisors (198724).

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

149840 is a wasteful number, since it uses less digits than its factorization.

149840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886 (or 1880 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 149840 is about 387.0917203971. The cubic root of 149840 is about 53.1140300302.

It can be divided in two parts, 149 and 840, that added together give a palindrome (989).

The spelling of 149840 in words is "one hundred forty-nine thousand, eight hundred forty".