904796820 has 36 divisors (see below), whose sum is σ = 2744550900. Its totient is φ = 241279104.

The previous prime is 904796773. The next prime is 904796843. The reversal of 904796820 is 28697409.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 118330884 + 786465936 = 10878^2 + 28044^2 .

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

It is a super-2 number, since 2×904796820² = 1637314570964224800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2513145 + ... + 2513504.

It is an arithmetic number, because the mean of its divisors is an integer number (76237525).

Almost surely, 2^904796820 is an apocalyptic number.

904796820 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

904796820 is an abundant number, since it is smaller than the sum of its proper divisors (1839754080).

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

904796820 is a wasteful number, since it uses less digits than its factorization.

904796820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026664 (or 5026659 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 904796820 is about 30079.8407575572. The cubic root of 904796820 is about 967.2016346562.

The spelling of 904796820 in words is "nine hundred four million, seven hundred ninety-six thousand, eight hundred twenty".