1012981788 has 480 divisors, whose sum is σ = 3606349824. Its totient is φ = 240371712.

The previous prime is 1012981727. The next prime is 1012981807. The reversal of 1012981788 is 8871892101.

It is a happy number.

It is a super-2 number, since 2×1012981788² = 2052264205639353888, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 21552781 + ... + 21552827.

Almost surely, 2^1012981788 is an apocalyptic number.

1012981788 is a gapful number since it is divisible by the number (18) 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 1012981788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1803174912).

1012981788 is an abundant number, since it is smaller than the sum of its proper divisors (2593368036).

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

1012981788 is a wasteful number, since it uses less digits than its factorization.

1012981788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 45.

The square root of 1012981788 is about 31827.3748210562. The cubic root of 1012981788 is about 1004.3086713548.

The spelling of 1012981788 in words is "one billion, twelve million, nine hundred eighty-one thousand, seven hundred eighty-eight".