343772778 has 8 divisors (see below), whose sum is σ = 687545568. Its totient is φ = 114590924.

The previous prime is 343772777. The next prime is 343772851. The reversal of 343772778 is 877277343.

It is a sphenic number, since it is the product of 3 distinct primes.

343772778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (343772773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28647726 + ... + 28647737.

It is an arithmetic number, because the mean of its divisors is an integer number (85943196).

Almost surely, 2^343772778 is an apocalyptic number.

343772778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

343772778 is a wasteful number, since it uses less digits than its factorization.

343772778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57295468.

The product of its digits is 1382976, while the sum is 48.

The square root of 343772778 is about 18541.1104845422. The cubic root of 343772778 is about 700.5253050135.

The spelling of 343772778 in words is "three hundred forty-three million, seven hundred seventy-two thousand, seven hundred seventy-eight".