156072420 has 120 divisors (see below), whose sum is σ = 559589184. Its totient is φ = 35671104.

The previous prime is 156072407. The next prime is 156072437. The reversal of 156072420 is 24270651.

156072420 is a `hidden beast` number, since 15 + 607 + 2 + 42 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4459 + ... + 18221.

Almost surely, 2^156072420 is an apocalyptic number.

156072420 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 156072420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279794592).

156072420 is an abundant number, since it is smaller than the sum of its proper divisors (403516764).

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

156072420 is a wasteful number, since it uses less digits than its factorization.

156072420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13791 (or 13780 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 156072420 is about 12492.8947806343. The cubic root of 156072420 is about 538.4045500860.

The spelling of 156072420 in words is "one hundred fifty-six million, seventy-two thousand, four hundred twenty".