156644436 has 96 divisors (see below), whose sum is σ = 424771200. Its totient is φ = 44513280.

The previous prime is 156644431. The next prime is 156644437. The reversal of 156644436 is 634446651.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 156644394 and 156644403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156644431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120880 + ... + 122168.

It is an arithmetic number, because the mean of its divisors is an integer number (4424700).

Almost surely, 2^156644436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156644436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212385600).

156644436 is an abundant number, since it is smaller than the sum of its proper divisors (268126764).

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

156644436 is a wasteful number, since it uses less digits than its factorization.

156644436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369 (or 1367 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 156644436 is about 12515.7674954435. The cubic root of 156644436 is about 539.0615111950.

It can be divided in two parts, 156644 and 436, that added together give a triangular number (157080 = T₅₆₀).

The spelling of 156644436 in words is "one hundred fifty-six million, six hundred forty-four thousand, four hundred thirty-six".