1374278978 has 8 divisors (see below), whose sum is σ = 2070663168. Its totient is φ = 684057924.

The previous prime is 1374278953. The next prime is 1374278989. The reversal of 1374278978 is 8798724731.

It is a happy number.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540226 + ... + 1541117.

It is an arithmetic number, because the mean of its divisors is an integer number (258832896).

Almost surely, 2^1374278978 is an apocalyptic number.

1374278978 is a deficient number, since it is larger than the sum of its proper divisors (696384190).

1374278978 is a wasteful number, since it uses less digits than its factorization.

1374278978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081568.

The product of its digits is 4741632, while the sum is 56.

The square root of 1374278978 is about 37071.2689019408. The cubic root of 1374278978 is about 1111.7956429886.

The spelling of 1374278978 in words is "one billion, three hundred seventy-four million, two hundred seventy-eight thousand, nine hundred seventy-eight".