3900729 has 8 divisors (see below), whose sum is σ = 5944000. Its totient is φ = 2228976.

The previous prime is 3900707. The next prime is 3900733. The reversal of 3900729 is 9270093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3900729 - 2⁵ = 3900697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3900696 and 3900705.

It is not an unprimeable number, because it can be changed into a prime (3900749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92854 + ... + 92895.

It is an arithmetic number, because the mean of its divisors is an integer number (743000).

Almost surely, 2^3900729 is an apocalyptic number.

It is an amenable number.

3900729 is a deficient number, since it is larger than the sum of its proper divisors (2043271).

3900729 is a wasteful number, since it uses less digits than its factorization.

3900729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185759.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 3900729 is about 1975.0263289384. The cubic root of 3900729 is about 157.4158986624.

The spelling of 3900729 in words is "three million, nine hundred thousand, seven hundred twenty-nine".