653501420 has 96 divisors (see below), whose sum is σ = 1707241536. Its totient is φ = 206438400.

The previous prime is 653501417. The next prime is 653501477. The reversal of 653501420 is 24105356.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 653501420.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41900 + ... + 55340.

It is an arithmetic number, because the mean of its divisors is an integer number (17783766).

Almost surely, 2^653501420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 653501420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (853620768).

653501420 is an abundant number, since it is smaller than the sum of its proper divisors (1053740116).

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

653501420 is a wasteful number, since it uses less digits than its factorization.

653501420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13491 (or 13489 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 653501420 is about 25563.6738361293. The cubic root of 653501420 is about 867.7917396966.

Adding to 653501420 its reverse (24105356), we get a palindrome (677606776).

The spelling of 653501420 in words is "six hundred fifty-three million, five hundred one thousand, four hundred twenty".