391156036 has 12 divisors (see below), whose sum is σ = 700442512. Its totient is φ = 191029608.

The previous prime is 391156033. The next prime is 391156057. The reversal of 391156036 is 630651193.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 391155992 and 391156010.

It is not an unprimeable number, because it can be changed into a prime (391156033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136910 + ... + 1137253.

Almost surely, 2^391156036 is an apocalyptic number.

It is an amenable number.

391156036 is a deficient number, since it is larger than the sum of its proper divisors (309286476).

391156036 is a wasteful number, since it uses less digits than its factorization.

391156036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274210 (or 2274208 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 391156036 is about 19777.6650795790. The cubic root of 391156036 is about 731.3355397438.

The spelling of 391156036 in words is "three hundred ninety-one million, one hundred fifty-six thousand, thirty-six".