1009120920 has 64 divisors (see below), whose sum is σ = 3047466240. Its totient is φ = 267312000.

The previous prime is 1009120919. The next prime is 1009120933. The reversal of 1009120920 is 290219001.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9726 + ... + 45965.

It is an arithmetic number, because the mean of its divisors is an integer number (47616660).

Almost surely, 2^1009120920 is an apocalyptic number.

1009120920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1009120920 is an abundant number, since it is smaller than the sum of its proper divisors (2038345320).

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

1009120920 is a wasteful number, since it uses less digits than its factorization.

1009120920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55856 (or 55852 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1009120920 is about 31766.6636586218. The cubic root of 1009120920 is about 1003.0311097574.

Adding to 1009120920 its reverse (290219001), we get a palindrome (1299339921).

The spelling of 1009120920 in words is "one billion, nine million, one hundred twenty thousand, nine hundred twenty".