391277046 has 16 divisors (see below), whose sum is σ = 792460800. Its totient is φ = 128774568.

The previous prime is 391277039. The next prime is 391277057. The reversal of 391277046 is 640772193.

It is a super-2 number, since 2×391277046² = 306195453452972232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 391276995 and 391277013.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 412266 + ... + 413213.

It is an arithmetic number, because the mean of its divisors is an integer number (49528800).

Almost surely, 2^391277046 is an apocalyptic number.

391277046 is an abundant number, since it is smaller than the sum of its proper divisors (401183754).

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

391277046 is a wasteful number, since it uses less digits than its factorization.

391277046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825563.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 391277046 is about 19780.7241020141. The cubic root of 391277046 is about 731.4109485159.

The spelling of 391277046 in words is "three hundred ninety-one million, two hundred seventy-seven thousand, forty-six".