1008389020 has 24 divisors (see below), whose sum is σ = 2131111584. Its totient is φ = 400785216.

The previous prime is 1008388999. The next prime is 1008389029. The reversal of 1008389020 is 209838001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1008389029) 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, 157432 + ... + 163711.

It is an arithmetic number, because the mean of its divisors is an integer number (88796316).

Almost surely, 2^1008389020 is an apocalyptic number.

1008389020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1008389020 is an abundant number, since it is smaller than the sum of its proper divisors (1122722564).

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

1008389020 is a wasteful number, since it uses less digits than its factorization.

1008389020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321309 (or 321307 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1008389020 is about 31755.1416309233. The cubic root of 1008389020 is about 1002.7885567234.

The spelling of 1008389020 in words is "one billion, eight million, three hundred eighty-nine thousand, twenty".