1023091840 has 32 divisors (see below), whose sum is σ = 2445830460. Its totient is φ = 409236480.

The previous prime is 1023091799. The next prime is 1023091859. The reversal of 1023091840 is 481903201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1022464576 + 627264 = 31976^2 + 792^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 1023091799 and 1023091808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798651 + ... + 799930.

Almost surely, 2^1023091840 is an apocalyptic number.

1023091840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023091840 is an abundant number, since it is smaller than the sum of its proper divisors (1422738620).

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

1023091840 is an equidigital number, since it uses as much as digits as its factorization.

1023091840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598600 (or 1598588 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1023091840 is about 31985.8068524150. The cubic root of 1023091840 is about 1007.6387804564.

The spelling of 1023091840 in words is "one billion, twenty-three million, ninety-one thousand, eight hundred forty".