156209140 has 12 divisors (see below), whose sum is σ = 328039236. Its totient is φ = 62483648.

The previous prime is 156209129. The next prime is 156209147. The reversal of 156209140 is 41902651.

It can be written as a sum of positive squares in 2 ways, for example, as 110754576 + 45454564 = 10524^2 + 6742^2 .

It is a junction number, because it is equal to n+sod(n) for n = 156209099 and 156209108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156209147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3905209 + ... + 3905248.

It is an arithmetic number, because the mean of its divisors is an integer number (27336603).

Almost surely, 2^156209140 is an apocalyptic number.

156209140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156209140 is an abundant number, since it is smaller than the sum of its proper divisors (171830096).

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

156209140 is a wasteful number, since it uses less digits than its factorization.

156209140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7810466 (or 7810464 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 156209140 is about 12498.3654931355. The cubic root of 156209140 is about 538.5617189741.

The spelling of 156209140 in words is "one hundred fifty-six million, two hundred nine thousand, one hundred forty".