29997928349378 has 24 divisors (see below), whose sum is σ = 49949091275580. Its totient is φ = 13500417788000.

The previous prime is 29997928349329. The next prime is 29997928349381. The reversal of 29997928349378 is 87394382979992.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28568308774489 + 1429619574889 = 5344933^2 + 1195667^2 .

It is a junction number, because it is equal to n+sod(n) for n = 29997928349293 and 29997928349302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 613630913 + ... + 613679796.

Almost surely, 2^{29997928349378} is an apocalyptic number.

29997928349378 is a deficient number, since it is larger than the sum of its proper divisors (19951162926202).

29997928349378 is a wasteful number, since it uses less digits than its factorization.

29997928349378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227310834 (or 1227310823 counting only the distinct ones).

The product of its digits is 26665583616, while the sum is 89.

The spelling of 29997928349378 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred twenty-eight million, three hundred forty-nine thousand, three hundred seventy-eight".