354643778 has 16 divisors (see below), whose sum is σ = 560355840. Its totient is φ = 167871600.

The previous prime is 354643771. The next prime is 354643781. The reversal of 354643778 is 877346453.

It is a super-2 number, since 2×354643778² = 251544418548226568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (354643771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78008 + ... + 82428.

It is an arithmetic number, because the mean of its divisors is an integer number (35022240).

Almost surely, 2^354643778 is an apocalyptic number.

354643778 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

354643778 is a deficient number, since it is larger than the sum of its proper divisors (205712062).

354643778 is a wasteful number, since it uses less digits than its factorization.

354643778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6553.

The product of its digits is 1693440, while the sum is 47.

The square root of 354643778 is about 18831.9881584500. The cubic root of 354643778 is about 707.8329601036.

The spelling of 354643778 in words is "three hundred fifty-four million, six hundred forty-three thousand, seven hundred seventy-eight".