156440 has 16 divisors (see below), whose sum is σ = 352080. Its totient is φ = 62560.

The previous prime is 156437. The next prime is 156467. The reversal of 156440 is 44651.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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, 1916 + ... + 1995.

It is an arithmetic number, because the mean of its divisors is an integer number (22005).

2¹⁵⁶⁴⁴⁰ is an apocalyptic number.

156440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156440 is an abundant number, since it is smaller than the sum of its proper divisors (195640).

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

156440 is a wasteful number, since it uses less digits than its factorization.

156440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3922 (or 3918 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 156440 is about 395.5249676063. The cubic root of 156440 is about 53.8826900126.

The spelling of 156440 in words is "one hundred fifty-six thousand, four hundred forty".