1021948650 has 252 divisors, whose sum is σ = 3035442438. Its totient is φ = 255752640.

The previous prime is 1021948643. The next prime is 1021948663. The reversal of 1021948650 is 568491201.

It can be written as a sum of positive squares in 3 ways, for example, as 851880969 + 170067681 = 29187^2 + 13041^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 125 ways as a sum of consecutive naturals, for example, 19282024 + ... + 19282076.

Almost surely, 2^1021948650 is an apocalyptic number.

1021948650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021948650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1517721219).

1021948650 is an abundant number, since it is smaller than the sum of its proper divisors (2013493788).

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

1021948650 is an equidigital number, since it uses as much as digits as its factorization.

1021948650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1021948650 is about 31967.9315877646. The cubic root of 1021948650 is about 1007.2633329332.

The spelling of 1021948650 in words is "one billion, twenty-one million, nine hundred forty-eight thousand, six hundred fifty".