391267048 has 8 divisors (see below), whose sum is σ = 733625730. Its totient is φ = 195633520.

The previous prime is 391267039. The next prime is 391267049. The reversal of 391267048 is 840762193.

It can be written as a sum of positive squares in only one way, i.e., 319051044 + 72216004 = 17862^2 + 8498^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 391267048.

It is not an unprimeable number, because it can be changed into a prime (391267049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24454183 + ... + 24454198.

Almost surely, 2^391267048 is an apocalyptic number.

It is an amenable number.

391267048 is a deficient number, since it is larger than the sum of its proper divisors (342358682).

391267048 is a wasteful number, since it uses less digits than its factorization.

391267048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48908387 (or 48908383 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 391267048 is about 19780.4713796209. The cubic root of 391267048 is about 731.4047187365.

The spelling of 391267048 in words is "three hundred ninety-one million, two hundred sixty-seven thousand, forty-eight".