1020159090 has 64 divisors (see below), whose sum is σ = 2783721600. Its totient is φ = 265712832.

The previous prime is 1020159083. The next prime is 1020159109. The reversal of 1020159090 is 909510201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32325 + ... + 55544.

It is an arithmetic number, because the mean of its divisors is an integer number (43495650).

Almost surely, 2^1020159090 is an apocalyptic number.

1020159090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020159090 is an abundant number, since it is smaller than the sum of its proper divisors (1763562510).

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

1020159090 is a wasteful number, since it uses less digits than its factorization.

1020159090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87928 (or 87922 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 1020159090 is about 31939.9293987949. The cubic root of 1020159090 is about 1006.6750413515.

Adding to 1020159090 its reverse (909510201), we get a palindrome (1929669291).

The spelling of 1020159090 in words is "one billion, twenty million, one hundred fifty-nine thousand, ninety".