653279820 has 24 divisors (see below), whose sum is σ = 1829183664. Its totient is φ = 174207936.

The previous prime is 653279761. The next prime is 653279821. The reversal of 653279820 is 28972356.

It is not an unprimeable number, because it can be changed into a prime (653279821) 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, 5443939 + ... + 5444058.

It is an arithmetic number, because the mean of its divisors is an integer number (76215986).

Almost surely, 2^653279820 is an apocalyptic number.

653279820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

653279820 is an abundant number, since it is smaller than the sum of its proper divisors (1175903844).

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

653279820 is a wasteful number, since it uses less digits than its factorization.

653279820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10888009 (or 10888007 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 653279820 is about 25559.3391933360. The cubic root of 653279820 is about 867.6936402464.

The spelling of 653279820 in words is "six hundred fifty-three million, two hundred seventy-nine thousand, eight hundred twenty".