681380372 has 24 divisors (see below), whose sum is σ = 1246479360. Its totient is φ = 325522080.

The previous prime is 681380333. The next prime is 681380407. The reversal of 681380372 is 273083186.

It is a happy number.

It is a super-2 number, since 2×681380372² = 928558422693716768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24983 + ... + 44574.

It is an arithmetic number, because the mean of its divisors is an integer number (51936640).

Almost surely, 2^681380372 is an apocalyptic number.

681380372 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

681380372 is a deficient number, since it is larger than the sum of its proper divisors (565098988).

681380372 is a wasteful number, since it uses less digits than its factorization.

681380372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69671 (or 69669 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 681380372 is about 26103.2636273704. The cubic root of 681380372 is about 879.9605578052.

The spelling of 681380372 in words is "six hundred eighty-one million, three hundred eighty thousand, three hundred seventy-two".