853009440 has 48 divisors (see below), whose sum is σ = 2686981248. Its totient is φ = 227469056.

The previous prime is 853009429. The next prime is 853009483. The reversal of 853009440 is 44900358.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×853009440² = 1455250209458227200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888072 + ... + 889031.

It is an arithmetic number, because the mean of its divisors is an integer number (55978776).

Almost surely, 2^853009440 is an apocalyptic number.

853009440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

853009440 is an abundant number, since it is smaller than the sum of its proper divisors (1833971808).

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

853009440 is a wasteful number, since it uses less digits than its factorization.

853009440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777121 (or 1777113 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 853009440 is about 29206.3253422953. The cubic root of 853009440 is about 948.3848603829.

Adding to 853009440 its reverse (44900358), we get a palindrome (897909798).

The spelling of 853009440 in words is "eight hundred fifty-three million, nine thousand, four hundred forty".