3977658 has 24 divisors (see below), whose sum is σ = 8686548. Its totient is φ = 1315392.

The previous prime is 3977653. The next prime is 3977663. The reversal of 3977658 is 8567793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3977653) and next prime (3977663).

It can be written as a sum of positive squares in 2 ways, for example, as 3932289 + 45369 = 1983^2 + 213^2 .

It is not an unprimeable number, because it can be changed into a prime (3977653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1660 + ... + 3272.

Almost surely, 2^3977658 is an apocalyptic number.

3977658 is an abundant number, since it is smaller than the sum of its proper divisors (4708890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3977658 is a wasteful number, since it uses less digits than its factorization.

3977658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758 (or 1755 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 3977658 is about 1994.4066786892. The cubic root of 3977658 is about 158.4440056033. Note that the first 3 decimals are identical.

The spelling of 3977658 in words is "three million, nine hundred seventy-seven thousand, six hundred fifty-eight".