391489098 has 64 divisors (see below), whose sum is σ = 1051287552. Its totient is φ = 93862080.

The previous prime is 391489097. The next prime is 391489103. The reversal of 391489098 is 890984193.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 391489098.

It is not an unprimeable number, because it can be changed into a prime (391489097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26586 + ... + 38597.

It is an arithmetic number, because the mean of its divisors is an integer number (16426368).

Almost surely, 2^391489098 is an apocalyptic number.

391489098 is an abundant number, since it is smaller than the sum of its proper divisors (659798454).

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

391489098 is a wasteful number, since it uses less digits than its factorization.

391489098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65219.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 391489098 is about 19786.0834426624. The cubic root of 391489098 is about 731.5430536711.

The spelling of 391489098 in words is "three hundred ninety-one million, four hundred eighty-nine thousand, ninety-eight".