3928870 has 48 divisors (see below), whose sum is σ = 8273664. Its totient is φ = 1337600.

The previous prime is 3928849. The next prime is 3928913. The reversal of 3928870 is 788293.

3928870 = T₆₈ + T₆₉ + ... + T₂₈₇.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20475 + ... + 20665.

It is an arithmetic number, because the mean of its divisors is an integer number (172368).

Almost surely, 2^3928870 is an apocalyptic number.

3928870 is an abundant number, since it is smaller than the sum of its proper divisors (4344794).

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

3928870 is a wasteful number, since it uses less digits than its factorization.

3928870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 3928870 is about 1982.1377348711. The cubic root of 3928870 is about 157.7935400873.

The spelling of 3928870 in words is "three million, nine hundred twenty-eight thousand, eight hundred seventy".