820739104 has 24 divisors (see below), whose sum is σ = 1628173008. Its totient is φ = 407234880.

The previous prime is 820739071. The next prime is 820739119. The reversal of 820739104 is 401937028.

It is a super-2 number, since 2×820739104² = 1347225353669445632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 820739104.

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, 93702 + ... + 102085.

It is an arithmetic number, because the mean of its divisors is an integer number (67840542).

Almost surely, 2^820739104 is an apocalyptic number.

It is an amenable number.

820739104 is a deficient number, since it is larger than the sum of its proper divisors (807433904).

820739104 is a wasteful number, since it uses less digits than its factorization.

820739104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195928 (or 195920 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 820739104 is about 28648.5445354559. The cubic root of 820739104 is about 936.2712949679.

The spelling of 820739104 in words is "eight hundred twenty million, seven hundred thirty-nine thousand, one hundred four".