940378778 has 4 divisors (see below), whose sum is σ = 1410568170. Its totient is φ = 470189388.

The previous prime is 940378771. The next prime is 940378787. The reversal of 940378778 is 877873049.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877873049 = 593 ⋅1480393.

It can be written as a sum of positive squares in only one way, i.e., 938993449 + 1385329 = 30643^2 + 1177^2 .

It is a super-2 number, since 2×940378778² = 1768624492225546568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (940378771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235094693 + ... + 235094696.

Almost surely, 2^940378778 is an apocalyptic number.

940378778 is a deficient number, since it is larger than the sum of its proper divisors (470189392).

940378778 is a wasteful number, since it uses less digits than its factorization.

940378778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470189391.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The square root of 940378778 is about 30665.5959994258. The cubic root of 940378778 is about 979.7176675241.

The spelling of 940378778 in words is "nine hundred forty million, three hundred seventy-eight thousand, seven hundred seventy-eight".