391416 has 32 divisors (see below), whose sum is σ = 1002240. Its totient is φ = 127328.

The previous prime is 391403. The next prime is 391441. The reversal of 391416 is 614193.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955 + ... + 1301.

It is an arithmetic number, because the mean of its divisors is an integer number (31320).

2³⁹¹⁴¹⁶ 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 391416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501120).

391416 is an abundant number, since it is smaller than the sum of its proper divisors (610824).

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

391416 is a wasteful number, since it uses less digits than its factorization.

391416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 399 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 391416 is about 625.6324799753. The cubic root of 391416 is about 73.1497520123.

It can be divided in two parts, 3 and 91416, that added together give a palindrome (91419).

The spelling of 391416 in words is "three hundred ninety-one thousand, four hundred sixteen".