920019090 has 128 divisors (see below), whose sum is σ = 2500388352. Its totient is φ = 215367680.

The previous prime is 920019053. The next prime is 920019109. The reversal of 920019090 is 90910029.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 479974 + ... + 481886.

It is an arithmetic number, because the mean of its divisors is an integer number (19534284).

Almost surely, 2^920019090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 920019090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1250194176).

920019090 is an abundant number, since it is smaller than the sum of its proper divisors (1580369262).

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

920019090 is a wasteful number, since it uses less digits than its factorization.

920019090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 920019090 is about 30331.8164639047. The cubic root of 920019090 is about 972.5955532450.

The spelling of 920019090 in words is "nine hundred twenty million, nineteen thousand, ninety".