156730644 has 72 divisors (see below), whose sum is σ = 454970880. Its totient is φ = 44563392.

The previous prime is 156730619. The next prime is 156730663. The reversal of 156730644 is 446037651.

It is a happy number.

156730644 is a `hidden beast` number, since 1 + 5 + 6 + 7 + 3 + 0 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 156730599 and 156730608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54802 + ... + 57590.

It is an arithmetic number, because the mean of its divisors is an integer number (6319040).

Almost surely, 2^156730644 is an apocalyptic number.

156730644 is a gapful number since it is divisible by the number (14) 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 156730644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227485440).

156730644 is an abundant number, since it is smaller than the sum of its proper divisors (298240236).

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

156730644 is a wasteful number, since it uses less digits than its factorization.

156730644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029 (or 3024 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 156730644 is about 12519.2109975030. The cubic root of 156730644 is about 539.1603824423.

The spelling of 156730644 in words is "one hundred fifty-six million, seven hundred thirty thousand, six hundred forty-four".