156820320 has 192 divisors, whose sum is σ = 567060480. Its totient is φ = 40435200.

The previous prime is 156820249. The next prime is 156820337. The reversal of 156820320 is 23028651.

It is a super-2 number, since 2×156820320² = 49185225529804800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133335 + ... + 134505.

It is an arithmetic number, because the mean of its divisors is an integer number (2953440).

Almost surely, 2^156820320 is an apocalyptic number.

156820320 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 156820320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283530240).

156820320 is an abundant number, since it is smaller than the sum of its proper divisors (410240160).

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

156820320 is a wasteful number, since it uses less digits than its factorization.

156820320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 156820320 is about 12522.7920209512. The cubic root of 156820320 is about 539.2631926454.

Adding to 156820320 its reverse (23028651), we get a palindrome (179848971).

The spelling of 156820320 in words is "one hundred fifty-six million, eight hundred twenty thousand, three hundred twenty".