1020890634 has 16 divisors (see below), whose sum is σ = 2149243680. Its totient is φ = 322386480.

The previous prime is 1020890623. The next prime is 1020890639. The reversal of 1020890634 is 4360980201.

1020890634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×1020890634³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020890595 and 1020890604.

It is not an unprimeable number, because it can be changed into a prime (1020890639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4477477 + ... + 4477704.

It is an arithmetic number, because the mean of its divisors is an integer number (134327730).

Almost surely, 2^1020890634 is an apocalyptic number.

1020890634 is an abundant number, since it is smaller than the sum of its proper divisors (1128353046).

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

1020890634 is a wasteful number, since it uses less digits than its factorization.

1020890634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8955205.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1020890634 is about 31951.3792190572. The cubic root of 1020890634 is about 1006.9156087741.

The spelling of 1020890634 in words is "one billion, twenty million, eight hundred ninety thousand, six hundred thirty-four".