351720378 has 24 divisors (see below), whose sum is σ = 806888628. Its totient is φ = 110343552.

The previous prime is 351720371. The next prime is 351720379. The reversal of 351720378 is 873027153.

It can be written as a sum of positive squares in 2 ways, for example, as 351675009 + 45369 = 18753^2 + 213^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (351720371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 574401 + ... + 575012.

Almost surely, 2^351720378 is an apocalyptic number.

351720378 is an abundant number, since it is smaller than the sum of its proper divisors (455168250).

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

351720378 is a wasteful number, since it uses less digits than its factorization.

351720378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149438 (or 1149435 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 351720378 is about 18754.2096074455. The cubic root of 351720378 is about 705.8826548357.

The spelling of 351720378 in words is "three hundred fifty-one million, seven hundred twenty thousand, three hundred seventy-eight".