653389020 has 36 divisors (see below), whose sum is σ = 1981947240. Its totient is φ = 174237024.

The previous prime is 653389001. The next prime is 653389027. The reversal of 653389020 is 20983356.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×653389020² = 853834422913120800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653389027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1814790 + ... + 1815149.

It is an arithmetic number, because the mean of its divisors is an integer number (55054090).

Almost surely, 2^653389020 is an apocalyptic number.

653389020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

653389020 is an abundant number, since it is smaller than the sum of its proper divisors (1328558220).

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

653389020 is a wasteful number, since it uses less digits than its factorization.

653389020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629954 (or 3629949 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 653389020 is about 25561.4753095356. The cubic root of 653389020 is about 867.7419844442.

The spelling of 653389020 in words is "six hundred fifty-three million, three hundred eighty-nine thousand, twenty".