3844897978 has 4 divisors (see below), whose sum is σ = 5767346970. Its totient is φ = 1922448988.

The previous prime is 3844897963. The next prime is 3844897993. The reversal of 3844897978 is 8797984483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8797984483 = 17 ⋅517528499.

It is an interprime number because it is at equal distance from previous prime (3844897963) and next prime (3844897993).

It can be written as a sum of positive squares in only one way, i.e., 3844868049 + 29929 = 62007^2 + 173^2 .

It is a super-2 number, since 2×3844897978² = 29566480922456976968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961224493 + ... + 961224496.

Almost surely, 2^3844897978 is an apocalyptic number.

3844897978 is a deficient number, since it is larger than the sum of its proper divisors (1922448992).

3844897978 is a wasteful number, since it uses less digits than its factorization.

3844897978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922448991.

The product of its digits is 97542144, while the sum is 67.

The square root of 3844897978 is about 62007.2413351860. The cubic root of 3844897978 is about 1566.6125699645.

The spelling of 3844897978 in words is "three billion, eight hundred forty-four million, eight hundred ninety-seven thousand, nine hundred seventy-eight".