1898794740 has 96 divisors (see below), whose sum is σ = 5416072704. Its totient is φ = 496932480.

The previous prime is 1898794727. The next prime is 1898794759. The reversal of 1898794740 is 474978981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1329907 + ... + 1331333.

It is an arithmetic number, because the mean of its divisors is an integer number (56417424).

Almost surely, 2^1898794740 is an apocalyptic number.

1898794740 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 1898794740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2708036352).

1898794740 is an abundant number, since it is smaller than the sum of its proper divisors (3517277964).

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

1898794740 is a wasteful number, since it uses less digits than its factorization.

1898794740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 57.

The square root of 1898794740 is about 43575.1619618333. The cubic root of 1898794740 is about 1238.3003813155.

The spelling of 1898794740 in words is "one billion, eight hundred ninety-eight million, seven hundred ninety-four thousand, seven hundred forty".