156240386 has 4 divisors (see below), whose sum is σ = 234360582. Its totient is φ = 78120192.

The previous prime is 156240379. The next prime is 156240389. The reversal of 156240386 is 683042651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 120012025 + 36228361 = 10955^2 + 6019^2 .

It is a super-2 number, since 2×156240386² = 48822116434857992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156240389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39060095 + ... + 39060098.

Almost surely, 2^156240386 is an apocalyptic number.

156240386 is a deficient number, since it is larger than the sum of its proper divisors (78120196).

156240386 is an equidigital number, since it uses as much as digits as its factorization.

156240386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78120195.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 156240386 is about 12499.6154340844. The cubic root of 156240386 is about 538.5976254893.

The spelling of 156240386 in words is "one hundred fifty-six million, two hundred forty thousand, three hundred eighty-six".