1901634380 has 48 divisors (see below), whose sum is σ = 4217391360. Its totient is φ = 718257600.

The previous prime is 1901634353. The next prime is 1901634421. The reversal of 1901634380 is 834361091.

It is a self number, because there is not a number n which added to its sum of digits gives 1901634380.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110135 + ... + 126225.

It is an arithmetic number, because the mean of its divisors is an integer number (87862320).

Almost surely, 2^1901634380 is an apocalyptic number.

1901634380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1901634380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2108695680).

1901634380 is an abundant number, since it is smaller than the sum of its proper divisors (2315756980).

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

1901634380 is a wasteful number, since it uses less digits than its factorization.

1901634380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16430 (or 16428 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1901634380 is about 43607.7330298194. The cubic root of 1901634380 is about 1238.9173649545.

The spelling of 1901634380 in words is "one billion, nine hundred one million, six hundred thirty-four thousand, three hundred eighty".