351997056 has 128 divisors (see below), whose sum is σ = 1046520000. Its totient is φ = 116471808.

The previous prime is 351997043. The next prime is 351997057. The reversal of 351997056 is 650799153.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (351997057) 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, 618340 + ... + 618908.

Almost surely, 2^351997056 is an apocalyptic number.

351997056 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 351997056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523260000).

351997056 is an abundant number, since it is smaller than the sum of its proper divisors (694522944).

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

351997056 is a wasteful number, since it uses less digits than its factorization.

351997056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 45.

The square root of 351997056 is about 18761.5845812661. The cubic root of 351997056 is about 706.0676986231.

The spelling of 351997056 in words is "three hundred fifty-one million, nine hundred ninety-seven thousand, fifty-six".