351491616 has 192 divisors, whose sum is σ = 1186617600. Its totient is φ = 99145728.

The previous prime is 351491599. The next prime is 351491639. The reversal of 351491616 is 616194153.

351491616 is a `hidden beast` number, since 35 + 1 + 4 + 9 + 1 + 616 = 666.

It is a super-2 number, since 2×351491616² = 247092712236582912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 537946 + ... + 538598.

It is an arithmetic number, because the mean of its divisors is an integer number (6180300).

Almost surely, 2^351491616 is an apocalyptic number.

351491616 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 351491616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (593308800).

351491616 is an abundant number, since it is smaller than the sum of its proper divisors (835125984).

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

351491616 is a wasteful number, since it uses less digits than its factorization.

351491616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768 (or 754 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 351491616 is about 18748.1096647102. The cubic root of 351491616 is about 705.7295842339.

The spelling of 351491616 in words is "three hundred fifty-one million, four hundred ninety-one thousand, six hundred sixteen".