391628601 has 120 divisors (see below), whose sum is σ = 746839104. Its totient is φ = 200154240.

The previous prime is 391628593. The next prime is 391628603. The reversal of 391628601 is 106826193.

391628601 is a `hidden beast` number, since 39 + 16 + 2 + 8 + 601 = 666.

It is not a de Polignac number, because 391628601 - 2³ = 391628593 is a prime.

It is a super-2 number, since 2×391628601² = 306745922242434402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (391628603) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 5845170 + ... + 5845236.

Almost surely, 2^391628601 is an apocalyptic number.

It is an amenable number.

391628601 is a deficient number, since it is larger than the sum of its proper divisors (355210503).

391628601 is a wasteful number, since it uses less digits than its factorization.

391628601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 391628601 is about 19789.6084094658. The cubic root of 391628601 is about 731.6299358957.

The spelling of 391628601 in words is "three hundred ninety-one million, six hundred twenty-eight thousand, six hundred one".