354078778 has 4 divisors (see below), whose sum is σ = 531118170. Its totient is φ = 177039388.

The previous prime is 354078763. The next prime is 354078779. The reversal of 354078778 is 877870453.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 243765769 + 110313009 = 15613^2 + 10503^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (354078779) by changing a digit.

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 as a sum of consecutive naturals, namely, 88519693 + ... + 88519696.

Almost surely, 2^354078778 is an apocalyptic number.

354078778 is a deficient number, since it is larger than the sum of its proper divisors (177039392).

354078778 is a wasteful number, since it uses less digits than its factorization.

354078778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177039391.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The square root of 354078778 is about 18816.9811074997. The cubic root of 354078778 is about 707.4568661039.

The spelling of 354078778 in words is "three hundred fifty-four million, seventy-eight thousand, seven hundred seventy-eight".