245821478 has 16 divisors (see below), whose sum is σ = 423270144. Its totient is φ = 104886600.

The previous prime is 245821439. The next prime is 245821481. The reversal of 245821478 is 874128542.

245821478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×245821478² = 120856398092208968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35498 + ... + 41853.

It is an arithmetic number, because the mean of its divisors is an integer number (26454384).

Almost surely, 2^245821478 is an apocalyptic number.

245821478 is a deficient number, since it is larger than the sum of its proper divisors (177448666).

245821478 is a wasteful number, since it uses less digits than its factorization.

245821478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77587.

The product of its digits is 143360, while the sum is 41.

The square root of 245821478 is about 15678.6950349830. The cubic root of 245821478 is about 626.4310487517.

The spelling of 245821478 in words is "two hundred forty-five million, eight hundred twenty-one thousand, four hundred seventy-eight".