156987720 has 192 divisors, whose sum is σ = 547223040. Its totient is φ = 40435200.

The previous prime is 156987713. The next prime is 156987739. The reversal of 156987720 is 27789651.

156987720 is a `hidden beast` number, since 1 + 569 + 87 + 7 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 301060 + ... + 301580.

It is an arithmetic number, because the mean of its divisors is an integer number (2850120).

Almost surely, 2^156987720 is an apocalyptic number.

156987720 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 156987720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273611520).

156987720 is an abundant number, since it is smaller than the sum of its proper divisors (390235320).

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

156987720 is a wasteful number, since it uses less digits than its factorization.

156987720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 156987720 is about 12529.4740512122. The cubic root of 156987720 is about 539.4550057058.

The spelling of 156987720 in words is "one hundred fifty-six million, nine hundred eighty-seven thousand, seven hundred twenty".