1401678478 has 8 divisors (see below), whose sum is σ = 2109235968. Its totient is φ = 698599824.

The previous prime is 1401678463. The next prime is 1401678479. The reversal of 1401678478 is 8748761041.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401678479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118926 + ... + 1120177.

It is an arithmetic number, because the mean of its divisors is an integer number (263654496).

Almost surely, 2^1401678478 is an apocalyptic number.

1401678478 is a deficient number, since it is larger than the sum of its proper divisors (707557490).

1401678478 is a wasteful number, since it uses less digits than its factorization.

1401678478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239418.

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 1401678478 is about 37438.9967547209. The cubic root of 1401678478 is about 1119.1358337195.

The spelling of 1401678478 in words is "one billion, four hundred one million, six hundred seventy-eight thousand, four hundred seventy-eight".