1948819090 has 16 divisors (see below), whose sum is σ = 3509435160. Its totient is φ = 779180800.

The previous prime is 1948819087. The next prime is 1948819091. The reversal of 1948819090 is 909188491.

It can be written as a sum of positive squares in 4 ways, for example, as 1366706961 + 582112129 = 36969^2 + 24127^2 .

It is not an unprimeable number, because it can be changed into a prime (1948819091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19111 + ... + 65290.

Almost surely, 2^1948819090 is an apocalyptic number.

1948819090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1948819090 is a deficient number, since it is larger than the sum of its proper divisors (1560616070).

1948819090 is a wasteful number, since it uses less digits than its factorization.

1948819090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86717.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 1948819090 is about 44145.4311339237. The cubic root of 1948819090 is about 1249.0807299865.

The spelling of 1948819090 in words is "one billion, nine hundred forty-eight million, eight hundred nineteen thousand, ninety".