1011998946 has 64 divisors (see below), whose sum is σ = 2344320000. Its totient is φ = 285270336.

The previous prime is 1011998929. The next prime is 1011998947. The reversal of 1011998946 is 6498991101.

It is a happy number.

It is a super-2 number, since 2×1011998946² = 2048283733410221832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1011998895 and 1011998904.

It is not an unprimeable number, because it can be changed into a prime (1011998947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2027805 + ... + 2028303.

It is an arithmetic number, because the mean of its divisors is an integer number (36630000).

Almost surely, 2^1011998946 is an apocalyptic number.

1011998946 is an abundant number, since it is smaller than the sum of its proper divisors (1332321054).

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

1011998946 is a wasteful number, since it uses less digits than its factorization.

1011998946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063.

The product of its (nonzero) digits is 139968, while the sum is 48.

The square root of 1011998946 is about 31811.9308750664. The cubic root of 1011998946 is about 1003.9837572702.

The spelling of 1011998946 in words is "one billion, eleven million, nine hundred ninety-eight thousand, nine hundred forty-six".