342669978 has 48 divisors (see below), whose sum is σ = 893181120. Its totient is φ = 92752128.

The previous prime is 342669973. The next prime is 342669989. The reversal of 342669978 is 879966243.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (342669973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69175 + ... + 73962.

It is an arithmetic number, because the mean of its divisors is an integer number (18607940).

Almost surely, 2^342669978 is an apocalyptic number.

342669978 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

342669978 is an abundant number, since it is smaller than the sum of its proper divisors (550511142).

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

342669978 is a wasteful number, since it uses less digits than its factorization.

342669978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143171 (or 143168 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 342669978 is about 18511.3472767381. The cubic root of 342669978 is about 699.7754231962.

It can be divided in two parts, 34266 and 9978, that added together give a palindrome (44244).

The spelling of 342669978 in words is "three hundred forty-two million, six hundred sixty-nine thousand, nine hundred seventy-eight".