3928204020690 has 24 divisors (see below), whose sum is σ = 10213330454028. Its totient is φ = 1047521072160.

The previous prime is 3928204020677. The next prime is 3928204020731. The reversal of 3928204020690 is 960204028293.

3928204020690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3860081454681 + 68122566009 = 1964709^2 + 261003^2 .

It is a super-2 number, since 2×3928204020690² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 21823355581 + ... + 21823355760.

Almost surely, 2^{3928204020690} is an apocalyptic number.

3928204020690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3928204020690 is an abundant number, since it is smaller than the sum of its proper divisors (6285126433338).

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

3928204020690 is a wasteful number, since it uses less digits than its factorization.

3928204020690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43646711354 (or 43646711351 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 3928204020690 in words is "three trillion, nine hundred twenty-eight billion, two hundred four million, twenty thousand, six hundred ninety".