820924704 has 36 divisors (see below), whose sum is σ = 2334505446. Its totient is φ = 273641472.

The previous prime is 820924703. The next prime is 820924723. The reversal of 820924704 is 407429028.

It can be written as a sum of positive squares in only one way, i.e., 426505104 + 394419600 = 20652^2 + 19860^2 .

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

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 (820924703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1424929 + ... + 1425504.

Almost surely, 2^820924704 is an apocalyptic number.

It is an amenable number.

820924704 is an abundant number, since it is smaller than the sum of its proper divisors (1513580742).

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

820924704 is a wasteful number, since it uses less digits than its factorization.

820924704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850449 (or 2850438 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 820924704 is about 28651.7836094021. The cubic root of 820924704 is about 936.3418650408.

The spelling of 820924704 in words is "eight hundred twenty million, nine hundred twenty-four thousand, seven hundred four".