1021602816 has 132 divisors (see below), whose sum is σ = 3177140512. Its totient is φ = 314302464.

The previous prime is 1021602793. The next prime is 1021602839. The reversal of 1021602816 is 6182061201.

It is an interprime number because it is at equal distance from previous prime (1021602793) and next prime (1021602839).

It is a self number, because there is not a number n which added to its sum of digits gives 1021602816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115545 + ... + 124071.

Almost surely, 2^1021602816 is an apocalyptic number.

1021602816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021602816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1588570256).

1021602816 is an abundant number, since it is smaller than the sum of its proper divisors (2155537696).

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

1021602816 is a wasteful number, since it uses less digits than its factorization.

1021602816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8566 (or 8545 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1021602816 is about 31962.5220531797. The cubic root of 1021602816 is about 1007.1496986493.

It can be divided in two parts, 102160 and 2816, that added together give a 4-th power (104976 = 18⁴).

The spelling of 1021602816 in words is "one billion, twenty-one million, six hundred two thousand, eight hundred sixteen".