819320742 has 12 divisors (see below), whose sum is σ = 1775194980. Its totient is φ = 273106908.

The previous prime is 819320741. The next prime is 819320783. The reversal of 819320742 is 247023918.

It is a junction number, because it is equal to n+sod(n) for n = 819320697 and 819320706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819320741) 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 5 ways as a sum of consecutive naturals, for example, 22758892 + ... + 22758927.

It is an arithmetic number, because the mean of its divisors is an integer number (147932915).

Almost surely, 2^819320742 is an apocalyptic number.

819320742 is an abundant number, since it is smaller than the sum of its proper divisors (955874238).

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

819320742 is a wasteful number, since it uses less digits than its factorization.

819320742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45517827 (or 45517824 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 819320742 is about 28623.7793102169. The cubic root of 819320742 is about 935.7316442497.

The spelling of 819320742 in words is "eight hundred nineteen million, three hundred twenty thousand, seven hundred forty-two".