156440000 has 70 divisors (see below), whose sum is σ = 388019544. Its totient is φ = 62560000.

The previous prime is 156439999. The next prime is 156440029. The reversal of 156440000 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 a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 38045 + ... + 41955.

Almost surely, 2^156440000 is an apocalyptic number.

156440000 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 156440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194009772).

156440000 is an abundant number, since it is smaller than the sum of its proper divisors (231579544).

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

156440000 is an frugal number, since it uses more digits than its factorization.

156440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943 (or 3918 counting only the distinct ones).

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

The square root of 156440000 is about 12507.5976910037. The cubic root of 156440000 is about 538.8269001255.

Adding to 156440000 its reverse (44651), we get a palindrome (156484651).

The spelling of 156440000 in words is "one hundred fifty-six million, four hundred forty thousand".