156400285 has 8 divisors (see below), whose sum is σ = 189402840. Its totient is φ = 123971904.

The previous prime is 156400273. The next prime is 156400313. The reversal of 156400285 is 582004651.

It can be written as a sum of positive squares in 4 ways, for example, as 30713764 + 125686521 = 5542^2 + 11211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 156400285 - 2¹⁵ = 156367517 is a prime.

It is a super-2 number, since 2×156400285² = 48922098296162450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142942 + ... + 144031.

It is an arithmetic number, because the mean of its divisors is an integer number (23675355).

Almost surely, 2^156400285 is an apocalyptic number.

It is an amenable number.

156400285 is a deficient number, since it is larger than the sum of its proper divisors (33002555).

156400285 is a wasteful number, since it uses less digits than its factorization.

156400285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287087.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 156400285 is about 12506.0099552175. The cubic root of 156400285 is about 538.7812994235.

The spelling of 156400285 in words is "one hundred fifty-six million, four hundred thousand, two hundred eighty-five".