1902068890 has 8 divisors (see below), whose sum is σ = 3423724020. Its totient is φ = 760827552.

The previous prime is 1902068873. The next prime is 1902068893. The reversal of 1902068890 is 988602091.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1886772969 + 15295921 = 43437^2 + 3911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1902068893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95103435 + ... + 95103454.

Almost surely, 2^1902068890 is an apocalyptic number.

1902068890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1902068890 is a deficient number, since it is larger than the sum of its proper divisors (1521655130).

1902068890 is a wasteful number, since it uses less digits than its factorization.

1902068890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190206896.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 1902068890 is about 43612.7147744783. The cubic root of 1902068890 is about 1239.0117190522.

The spelling of 1902068890 in words is "one billion, nine hundred two million, sixty-eight thousand, eight hundred ninety".