1379778 has 8 divisors (see below), whose sum is σ = 2759568. Its totient is φ = 459924.

The previous prime is 1379753. The next prime is 1379797. The reversal of 1379778 is 8779731.

It is a happy number.

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

1379778 is an admirable 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, 114976 + ... + 114987.

It is an arithmetic number, because the mean of its divisors is an integer number (344946).

2^1379778 is an apocalyptic number.

1379778 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.

1379778 is a wasteful number, since it uses less digits than its factorization.

1379778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229968.

The product of its digits is 74088, while the sum is 42.

The square root of 1379778 is about 1174.6395191717. The cubic root of 1379778 is about 111.3276577678.

The spelling of 1379778 in words is "one million, three hundred seventy-nine thousand, seven hundred seventy-eight".