1805734690 has 16 divisors (see below), whose sum is σ = 3325912128. Its totient is φ = 705496176.

The previous prime is 1805734687. The next prime is 1805734691. The reversal of 1805734690 is 964375081.

It is a super-2 number, since 2×1805734690² = 6521355541338792200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (1805734691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2099262 + ... + 2100121.

It is an arithmetic number, because the mean of its divisors is an integer number (207869508).

Almost surely, 2^1805734690 is an apocalyptic number.

1805734690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1805734690 is a deficient number, since it is larger than the sum of its proper divisors (1520177438).

1805734690 is a wasteful number, since it uses less digits than its factorization.

1805734690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4199433.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1805734690 is about 42493.9370969554. The cubic root of 1805734690 is about 1217.7308645599.

The spelling of 1805734690 in words is "one billion, eight hundred five million, seven hundred thirty-four thousand, six hundred ninety".