653720970 has 64 divisors (see below), whose sum is σ = 1802188800. Its totient is φ = 148661568.

The previous prime is 653720939. The next prime is 653720981. The reversal of 653720970 is 79027356.

It is a super-2 number, since 2×653720970² = 854702213235481800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33969 + ... + 49611.

It is an arithmetic number, because the mean of its divisors is an integer number (28159200).

Almost surely, 2^653720970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 653720970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901094400).

653720970 is an abundant number, since it is smaller than the sum of its proper divisors (1148467830).

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

653720970 is a wasteful number, since it uses less digits than its factorization.

653720970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15859.

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 653720970 is about 25567.9676548606. The cubic root of 653720970 is about 867.8889097707. Note that the first 3 decimals are identical.

The spelling of 653720970 in words is "six hundred fifty-three million, seven hundred twenty thousand, nine hundred seventy".