13950778 has 8 divisors (see below), whose sum is σ = 22157172. Its totient is φ = 6565056.

The previous prime is 13950773. The next prime is 13950787. The reversal of 13950778 is 87705931.

It can be written as a sum of positive squares in 2 ways, for example, as 13816089 + 134689 = 3717^2 + 367^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 13950778.

It is not an unprimeable number, because it can be changed into a prime (13950773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205125 + ... + 205192.

Almost surely, 2^13950778 is an apocalyptic number.

13950778 is a deficient number, since it is larger than the sum of its proper divisors (8206394).

13950778 is a wasteful number, since it uses less digits than its factorization.

13950778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410336.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 13950778 is about 3735.0740287175. The cubic root of 13950778 is about 240.7314375465.

The spelling of 13950778 in words is "thirteen million, nine hundred fifty thousand, seven hundred seventy-eight".