245621448 has 36 divisors (see below), whose sum is σ = 665585115. Its totient is φ = 81829488.

The previous prime is 245621419. The next prime is 245621449. The reversal of 245621448 is 844126542.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

245621448 is a `hidden beast` number, since 24 + 5 + 621 + 4 + 4 + 8 = 666.

245621448 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 122810724 + 122810724 = 11082^2 + 11082^2 .

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

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=11082.

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

It is not an unprimeable number, because it can be changed into a prime (245621449) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 132061 + ... + 133907.

Almost surely, 2^245621448 is an apocalyptic number.

It is an amenable number.

245621448 is an abundant number, since it is smaller than the sum of its proper divisors (419963667).

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

245621448 is an equidigital number, since it uses as much as digits as its factorization.

245621448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3706 (or 1852 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 245621448 is about 15672.3146982186. The cubic root of 245621448 is about 626.2610893610.

The spelling of 245621448 in words is "two hundred forty-five million, six hundred twenty-one thousand, four hundred forty-eight".