1020091308 has 24 divisors (see below), whose sum is σ = 2483701248. Its totient is φ = 325246416.

The previous prime is 1020091253. The next prime is 1020091379. The reversal of 1020091308 is 8031900201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1847716 + ... + 1848267.

It is an arithmetic number, because the mean of its divisors is an integer number (103487552).

Almost surely, 2^1020091308 is an apocalyptic number.

It is an amenable number.

1020091308 is an abundant number, since it is smaller than the sum of its proper divisors (1463609940).

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

1020091308 is a wasteful number, since it uses less digits than its factorization.

1020091308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696013 (or 3696011 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1020091308 is about 31938.8682955423. The cubic root of 1020091308 is about 1006.6527454960.

Adding to 1020091308 its reverse (8031900201), we get a palindrome (9051991509).

The spelling of 1020091308 in words is "one billion, twenty million, ninety-one thousand, three hundred eight".