920778340 has 12 divisors (see below), whose sum is σ = 1933634556. Its totient is φ = 368311328.

The previous prime is 920778311. The next prime is 920778349. The reversal of 920778340 is 43877029.

It can be written as a sum of positive squares in 2 ways, for example, as 342472036 + 578306304 = 18506^2 + 24048^2 .

It is a junction number, because it is equal to n+sod(n) for n = 920778293 and 920778302.

It is not an unprimeable number, because it can be changed into a prime (920778349) 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 3 ways as a sum of consecutive naturals, for example, 23019439 + ... + 23019478.

It is an arithmetic number, because the mean of its divisors is an integer number (161136213).

Almost surely, 2^920778340 is an apocalyptic number.

It is an amenable number.

920778340 is an abundant number, since it is smaller than the sum of its proper divisors (1012856216).

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

920778340 is a wasteful number, since it uses less digits than its factorization.

920778340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46038926 (or 46038924 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 920778340 is about 30344.3296185630. The cubic root of 920778340 is about 972.8630260038.

The spelling of 920778340 in words is "nine hundred twenty million, seven hundred seventy-eight thousand, three hundred forty".