3997770 has 32 divisors (see below), whose sum is σ = 10965888. Its totient is φ = 913728.

The previous prime is 3997769. The next prime is 3997801. The reversal of 3997770 is 777993.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9309 + ... + 9728.

It is an arithmetic number, because the mean of its divisors is an integer number (342684).

Almost surely, 2^3997770 is an apocalyptic number.

3997770 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3997770 is an abundant number, since it is smaller than the sum of its proper divisors (6968118).

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

3997770 is a wasteful number, since it uses less digits than its factorization.

3997770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19054.

The product of its (nonzero) digits is 83349, while the sum is 42.

The square root of 3997770 is about 1999.4424222768. The cubic root of 3997770 is about 158.7106005103.

The spelling of 3997770 in words is "three million, nine hundred ninety-seven thousand, seven hundred seventy".