1021634908 has 36 divisors (see below), whose sum is σ = 2090392920. Its totient is φ = 435604512.

The previous prime is 1021634903. The next prime is 1021634947. The reversal of 1021634908 is 8094361201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021634903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25383 + ... + 51841.

It is an arithmetic number, because the mean of its divisors is an integer number (58066470).

Almost surely, 2^1021634908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021634908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1045196460).

1021634908 is an abundant number, since it is smaller than the sum of its proper divisors (1068758012).

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

1021634908 is a wasteful number, since it uses less digits than its factorization.

1021634908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26674 (or 26665 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1021634908 is about 31963.0240747023. The cubic root of 1021634908 is about 1007.1602445318.

The spelling of 1021634908 in words is "one billion, twenty-one million, six hundred thirty-four thousand, nine hundred eight".