3973778 has 4 divisors (see below), whose sum is σ = 5960670. Its totient is φ = 1986888.

The previous prime is 3973757. The next prime is 3973787. The reversal of 3973778 is 8773793.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3853369 + 120409 = 1963^2 + 347^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993443 + ... + 993446.

Almost surely, 2^3973778 is an apocalyptic number.

3973778 is a deficient number, since it is larger than the sum of its proper divisors (1986892).

3973778 is a wasteful number, since it uses less digits than its factorization.

3973778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986891.

The product of its digits is 222264, while the sum is 44.

The square root of 3973778 is about 1993.4337209950. The cubic root of 3973778 is about 158.3924708611.

The spelling of 3973778 in words is "three million, nine hundred seventy-three thousand, seven hundred seventy-eight".