920350640 has 80 divisors (see below), whose sum is σ = 2338912800. Its totient is φ = 334018560.

The previous prime is 920350631. The next prime is 920350643. The reversal of 920350640 is 46053029.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (920350643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876836 + ... + 877884.

It is an arithmetic number, because the mean of its divisors is an integer number (29236410).

Almost surely, 2^920350640 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 920350640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169456400).

920350640 is an abundant number, since it is smaller than the sum of its proper divisors (1418562160).

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

920350640 is a wasteful number, since it uses less digits than its factorization.

920350640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2070 (or 2064 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 920350640 is about 30337.2813547951. The cubic root of 920350640 is about 972.7123715920.

The spelling of 920350640 in words is "nine hundred twenty million, three hundred fifty thousand, six hundred forty".