1804406990 has 16 divisors (see below), whose sum is σ = 3249711360. Its totient is φ = 721367520.

The previous prime is 1804406959. The next prime is 1804407041. The reversal of 1804406990 is 996044081.

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, 29870 + ... + 67089.

It is an arithmetic number, because the mean of its divisors is an integer number (203106960).

Almost surely, 2^1804406990 is an apocalyptic number.

1804406990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1804406990 is a deficient number, since it is larger than the sum of its proper divisors (1445304370).

1804406990 is a wasteful number, since it uses less digits than its factorization.

1804406990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98827.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1804406990 is about 42478.3119956526. The cubic root of 1804406990 is about 1217.4323382969.

The spelling of 1804406990 in words is "one billion, eight hundred four million, four hundred six thousand, nine hundred ninety".