3493800781 has 24 divisors (see below), whose sum is σ = 3955371264. Its totient is φ = 3072088320.

The previous prime is 3493800767. The next prime is 3493800797. The reversal of 3493800781 is 1870083943.

It is a happy number.

It is not a de Polignac number, because 3493800781 - 2²⁷ = 3359583053 is a prime.

It is a super-2 number, since 2×3493800781² = 24413287794632419922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3493804781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 439266 + ... + 447148.

It is an arithmetic number, because the mean of its divisors is an integer number (164807136).

Almost surely, 2^3493800781 is an apocalyptic number.

3493800781 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3493800781 is a deficient number, since it is larger than the sum of its proper divisors (461570483).

3493800781 is a wasteful number, since it uses less digits than its factorization.

3493800781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7989 (or 7960 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 3493800781 is about 59108.3816476141. The cubic root of 3493800781 is about 1517.3975523661.

The spelling of 3493800781 in words is "three billion, four hundred ninety-three million, eight hundred thousand, seven hundred eighty-one".