1939000090 has 24 divisors (see below), whose sum is σ = 3606436980. Its totient is φ = 750576960.

The previous prime is 1939000061. The next prime is 1939000111. The reversal of 1939000090 is 900009391.

It can be written as a sum of positive squares in 2 ways, for example, as 1929581329 + 9418761 = 43927^2 + 3069^2 .

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91275 + ... + 110494.

Almost surely, 2^1939000090 is an apocalyptic number.

1939000090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1939000090 is a deficient number, since it is larger than the sum of its proper divisors (1667436890).

1939000090 is a wasteful number, since it uses less digits than its factorization.

1939000090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201838 (or 201807 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 1939000090 is about 44034.0787345438. The cubic root of 1939000090 is about 1246.9793924904.

The spelling of 1939000090 in words is "one billion, nine hundred thirty-nine million, ninety", and thus it is an aban number.