920257780 has 96 divisors (see below), whose sum is σ = 2212479360. Its totient is φ = 318712320.

The previous prime is 920257759. The next prime is 920257781. The reversal of 920257780 is 87752029.

920257780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920257781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 527710 + ... + 529450.

It is an arithmetic number, because the mean of its divisors is an integer number (23046660).

Almost surely, 2^920257780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 920257780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1106239680).

920257780 is an abundant number, since it is smaller than the sum of its proper divisors (1292221580).

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

920257780 is a wasteful number, since it uses less digits than its factorization.

920257780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 920257780 is about 30335.7508560444. The cubic root of 920257780 is about 972.6796561228.

The spelling of 920257780 in words is "nine hundred twenty million, two hundred fifty-seven thousand, seven hundred eighty".