1440349978 has 8 divisors (see below), whose sum is σ = 2177017920. Its totient is φ = 714677340.

The previous prime is 1440349969. The next prime is 1440349997. The reversal of 1440349978 is 8799430441.

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

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, 2748498 + ... + 2749021.

It is an arithmetic number, because the mean of its divisors is an integer number (272127240).

Almost surely, 2^1440349978 is an apocalyptic number.

1440349978 is a deficient number, since it is larger than the sum of its proper divisors (736667942).

1440349978 is a wasteful number, since it uses less digits than its factorization.

1440349978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5497652.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 1440349978 is about 37951.9430069134. The cubic root of 1440349978 is about 1129.3347111100.

The spelling of 1440349978 in words is "one billion, four hundred forty million, three hundred forty-nine thousand, nine hundred seventy-eight".