1901420660 has 12 divisors (see below), whose sum is σ = 3992983428. Its totient is φ = 760568256.

The previous prime is 1901420627. The next prime is 1901420669. The reversal of 1901420660 is 660241091.

It can be written as a sum of positive squares in 2 ways, for example, as 360544144 + 1540876516 = 18988^2 + 39254^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901420669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47535497 + ... + 47535536.

It is an arithmetic number, because the mean of its divisors is an integer number (332748619).

Almost surely, 2^1901420660 is an apocalyptic number.

1901420660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1901420660 is an abundant number, since it is smaller than the sum of its proper divisors (2091562768).

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

1901420660 is a wasteful number, since it uses less digits than its factorization.

1901420660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95071042 (or 95071040 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1901420660 is about 43605.2824781585. The cubic root of 1901420660 is about 1238.8709502595.

The spelling of 1901420660 in words is "one billion, nine hundred one million, four hundred twenty thousand, six hundred sixty".