3920557 has 16 divisors (see below), whose sum is σ = 4465152. Its totient is φ = 3421440.

The previous prime is 3920551. The next prime is 3920561. The reversal of 3920557 is 7550293.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3920557 - 2⁷ = 3920429 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14332 + ... + 14602.

It is an arithmetic number, because the mean of its divisors is an integer number (279072).

Almost surely, 2^3920557 is an apocalyptic number.

3920557 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

3920557 is a deficient number, since it is larger than the sum of its proper divisors (544595).

3920557 is a wasteful number, since it uses less digits than its factorization.

3920557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 3920557 is about 1980.0396460677. The cubic root of 3920557 is about 157.6821710045.

The spelling of 3920557 in words is "three million, nine hundred twenty thousand, five hundred fifty-seven".