156860640 has 144 divisors (see below), whose sum is σ = 541286928. Its totient is φ = 41361408.

The previous prime is 156860633. The next prime is 156860687. The reversal of 156860640 is 46068651.

156860640 is a `hidden beast` number, since 1 + 5 + 6 + 8 + 6 + 0 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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 = 156860595 and 156860604.

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, 139119 + ... + 140241.

It is an arithmetic number, because the mean of its divisors is an integer number (3758937).

Almost surely, 2^156860640 is an apocalyptic number.

156860640 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 156860640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270643464).

156860640 is an abundant number, since it is smaller than the sum of its proper divisors (384426288).

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

156860640 is a wasteful number, since it uses less digits than its factorization.

156860640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 156860640 is about 12524.4017821212. The cubic root of 156860640 is about 539.3094052551.

The spelling of 156860640 in words is "one hundred fifty-six million, eight hundred sixty thousand, six hundred forty".