391890462 has 16 divisors (see below), whose sum is σ = 784114320. Its totient is φ = 130574592.

The previous prime is 391890461. The next prime is 391890463. The reversal of 391890462 is 264098193.

It is an interprime number because it is at equal distance from previous prime (391890461) and next prime (391890463).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391890461) by changing a digit.

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, 2964 + ... + 28152.

It is an arithmetic number, because the mean of its divisors is an integer number (49007145).

Almost surely, 2^391890462 is an apocalyptic number.

391890462 is an abundant number, since it is smaller than the sum of its proper divisors (392223858).

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

391890462 is a wasteful number, since it uses less digits than its factorization.

391890462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27787.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 391890462 is about 19796.2234277147. The cubic root of 391890462 is about 731.7929667716.

The spelling of 391890462 in words is "three hundred ninety-one million, eight hundred ninety thousand, four hundred sixty-two".