391620036 has 24 divisors (see below), whose sum is σ = 916423200. Its totient is φ = 130162432.

The previous prime is 391620029. The next prime is 391620037. The reversal of 391620036 is 630026193.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 391619985 and 391620012.

It is not an unprimeable number, because it can be changed into a prime (391620037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42861 + ... + 51188.

It is an arithmetic number, because the mean of its divisors is an integer number (38184300).

Almost surely, 2^391620036 is an apocalyptic number.

It is an amenable number.

391620036 is an abundant number, since it is smaller than the sum of its proper divisors (524803164).

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

391620036 is a wasteful number, since it uses less digits than its factorization.

391620036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94403 (or 94401 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 391620036 is about 19789.3920068303. The cubic root of 391620036 is about 731.6246022232.

The spelling of 391620036 in words is "three hundred ninety-one million, six hundred twenty thousand, thirty-six".