3904020692985 has 64 divisors (see below), whose sum is σ = 7545948364800. Its totient is φ = 1683689317632.

The previous prime is 3904020692983. The next prime is 3904020693019. The reversal of 3904020692985 is 5892960204093.

It is not a de Polignac number, because 3904020692985 - 2¹ = 3904020692983 is a prime.

It is a super-3 number, since 3×3904020692985³ (a number of 39 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3904020692983) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3617134 + ... + 4570743.

It is an arithmetic number, because the mean of its divisors is an integer number (117905443200).

Almost surely, 2^{3904020692985} is an apocalyptic number.

3904020692985 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3904020692985 is a deficient number, since it is larger than the sum of its proper divisors (3641927671815).

3904020692985 is a wasteful number, since it uses less digits than its factorization.

3904020692985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8188150.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 3904020692985 in words is "three trillion, nine hundred four billion, twenty million, six hundred ninety-two thousand, nine hundred eighty-five".