391411488 has 96 divisors (see below), whose sum is σ = 1130201856. Its totient is φ = 117854208.

The previous prime is 391411481. The next prime is 391411507. The reversal of 391411488 is 884114193.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (391411481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55320 + ... + 61992.

It is an arithmetic number, because the mean of its divisors is an integer number (11772936).

Almost surely, 2^391411488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391411488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (565100928).

391411488 is an abundant number, since it is smaller than the sum of its proper divisors (738790368).

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

391411488 is a wasteful number, since it uses less digits than its factorization.

391411488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6746 (or 6738 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 391411488 is about 19784.1221185071. The cubic root of 391411488 is about 731.4947093631.

The spelling of 391411488 in words is "three hundred ninety-one million, four hundred eleven thousand, four hundred eighty-eight".