351920240 has 160 divisors (see below), whose sum is σ = 989936640. Its totient is φ = 113743872.

The previous prime is 351920221. The next prime is 351920267. The reversal of 351920240 is 42029153.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1146167 + ... + 1146473.

It is an arithmetic number, because the mean of its divisors is an integer number (6187104).

Almost surely, 2^351920240 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 351920240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494968320).

351920240 is an abundant number, since it is smaller than the sum of its proper divisors (638016400).

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

351920240 is a wasteful number, since it uses less digits than its factorization.

351920240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 351920240 is about 18759.5373077270. The cubic root of 351920240 is about 706.0163333808.

Adding to 351920240 its reverse (42029153), we get a palindrome (393949393).

The spelling of 351920240 in words is "three hundred fifty-one million, nine hundred twenty thousand, two hundred forty".