3953728378 has 4 divisors (see below), whose sum is σ = 5930592570. Its totient is φ = 1976864188.

The previous prime is 3953728367. The next prime is 3953728381. The reversal of 3953728378 is 8738273593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8738273593 = 7 ⋅1248324799.

It can be written as a sum of positive squares in only one way, i.e., 2536431769 + 1417296609 = 50363^2 + 37647^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988432093 + ... + 988432096.

Almost surely, 2^3953728378 is an apocalyptic number.

3953728378 is a deficient number, since it is larger than the sum of its proper divisors (1976864192).

3953728378 is a wasteful number, since it uses less digits than its factorization.

3953728378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976864191.

The product of its digits is 7620480, while the sum is 55.

The square root of 3953728378 is about 62878.6798366505. The cubic root of 3953728378 is about 1581.2563283910.

The spelling of 3953728378 in words is "three billion, nine hundred fifty-three million, seven hundred twenty-eight thousand, three hundred seventy-eight".