3921650 has 24 divisors (see below), whose sum is σ = 7476084. Its totient is φ = 1529600.

The previous prime is 3921649. The next prime is 3921677. The reversal of 3921650 is 561293.

It can be written as a sum of positive squares in 6 ways, for example, as 1142761 + 2778889 = 1069^2 + 1667^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1094 + ... + 3006.

Almost surely, 2^3921650 is an apocalyptic number.

3921650 is a deficient number, since it is larger than the sum of its proper divisors (3554434).

3921650 is a wasteful number, since it uses less digits than its factorization.

3921650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966 (or 1961 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 3921650 is about 1980.3156314083. The cubic root of 3921650 is about 157.6968228851.

It can be divided in two parts, 39 and 21650, that multiplied together give a triangular number (844350 = T₁₂₉₉).

The spelling of 3921650 in words is "three million, nine hundred twenty-one thousand, six hundred fifty".