1902420180 has 54 divisors (see below), whose sum is σ = 5772450138. Its totient is φ = 507156000.

The previous prime is 1902420167. The next prime is 1902420181. The reversal of 1902420180 is 810242091.

It can be written as a sum of positive squares in only one way, i.e., 1521936144 + 380484036 = 39012^2 + 19506^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1902420181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 583555 + ... + 586805.

Almost surely, 2^1902420180 is an apocalyptic number.

1902420180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1902420180 is an abundant number, since it is smaller than the sum of its proper divisors (3870029958).

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

1902420180 is an equidigital number, since it uses as much as digits as its factorization.

1902420180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6517 (or 3261 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1902420180 is about 43616.7419691109. The cubic root of 1902420180 is about 1239.0879913745.

It can be divided in two parts, 19024 and 20180, that added together give a square (39204 = 198²).

The spelling of 1902420180 in words is "one billion, nine hundred two million, four hundred twenty thousand, one hundred eighty".