1234347678 has 12 divisors (see below), whose sum is σ = 2674420008. Its totient is φ = 411449220.

The previous prime is 1234347643. The next prime is 1234347701. The reversal of 1234347678 is 8767434321.

1234347678 is a `hidden beast` number, since 1 + 234 + 347 + 6 + 78 = 666.

It is a super-2 number, since 2×1234347678² = 3047228380367983368, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34287418 + ... + 34287453.

It is an arithmetic number, because the mean of its divisors is an integer number (222868334).

Almost surely, 2^1234347678 is an apocalyptic number.

1234347678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1234347678 is an abundant number, since it is smaller than the sum of its proper divisors (1440072330).

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

1234347678 is a wasteful number, since it uses less digits than its factorization.

1234347678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68574879 (or 68574876 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 1234347678 is about 35133.2844749818. The cubic root of 1234347678 is about 1072.7021921434.

The spelling of 1234347678 in words is "one billion, two hundred thirty-four million, three hundred forty-seven thousand, six hundred seventy-eight".