820575454 has 8 divisors (see below), whose sum is σ = 1234516608. Its totient is φ = 409069920.

The previous prime is 820575421. The next prime is 820575463. The reversal of 820575454 is 454575028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×820575454² = 1346688151414612232, 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 3 ways as a sum of consecutive naturals, for example, 608062 + ... + 609409.

It is an arithmetic number, because the mean of its divisors is an integer number (154314576).

Almost surely, 2^820575454 is an apocalyptic number.

820575454 is a deficient number, since it is larger than the sum of its proper divisors (413941154).

820575454 is a wasteful number, since it uses less digits than its factorization.

820575454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217810.

The product of its (nonzero) digits is 224000, while the sum is 40.

The square root of 820575454 is about 28645.6882270264. The cubic root of 820575454 is about 936.2090620441.

The spelling of 820575454 in words is "eight hundred twenty million, five hundred seventy-five thousand, four hundred fifty-four".