3920457 has 4 divisors (see below), whose sum is σ = 5227280. Its totient is φ = 2613636.

The previous prime is 3920453. The next prime is 3920459. The reversal of 3920457 is 7540293.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3920457 - 2² = 3920453 is a prime.

It is a D-number.

It is a Duffinian number.

3920457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3920453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653407 + ... + 653412.

It is an arithmetic number, because the mean of its divisors is an integer number (1306820).

Almost surely, 2^3920457 is an apocalyptic number.

It is an amenable number.

3920457 is a deficient number, since it is larger than the sum of its proper divisors (1306823).

3920457 is a wasteful number, since it uses less digits than its factorization.

3920457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306822.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 3920457 is about 1980.0143938871. The cubic root of 3920457 is about 157.6808303488.

The spelling of 3920457 in words is "three million, nine hundred twenty thousand, four hundred fifty-seven".