3720856 has 8 divisors (see below), whose sum is σ = 6976620. Its totient is φ = 1860424.

The previous prime is 3720853. The next prime is 3720859. The reversal of 3720856 is 6580273.

It is an interprime number because it is at equal distance from previous prime (3720853) and next prime (3720859).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3720851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232546 + ... + 232561.

Almost surely, 2^3720856 is an apocalyptic number.

It is an amenable number.

3720856 is a deficient number, since it is larger than the sum of its proper divisors (3255764).

3720856 is a wasteful number, since it uses less digits than its factorization.

3720856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465113 (or 465109 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 3720856 is about 1928.9520470971. The cubic root of 3720856 is about 154.9581017521.

The spelling of 3720856 in words is "three million, seven hundred twenty thousand, eight hundred fifty-six".