653900442 has 64 divisors (see below), whose sum is σ = 1474986240. Its totient is φ = 191752704.

The previous prime is 653900437. The next prime is 653900473. The reversal of 653900442 is 244009356.

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, 697398 + ... + 698334.

It is an arithmetic number, because the mean of its divisors is an integer number (23046660).

Almost surely, 2^653900442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 653900442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737493120).

653900442 is an abundant number, since it is smaller than the sum of its proper divisors (821085798).

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

653900442 is a wasteful number, since it uses less digits than its factorization.

653900442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 653900442 is about 25571.4771180704. The cubic root of 653900442 is about 867.9683256650.

Adding to 653900442 its reverse (244009356), we get a palindrome (897909798).

The spelling of 653900442 in words is "six hundred fifty-three million, nine hundred thousand, four hundred forty-two".