1019888040 has 64 divisors (see below), whose sum is σ = 3064008960. Its totient is φ = 271584000.

The previous prime is 1019888033. The next prime is 1019888041. The reversal of 1019888040 is 408889101.

It is a happy number.

It is a super-2 number, since 2×1019888040² = 2080343228270083200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1019888040.

It is not an unprimeable number, because it can be changed into a prime (1019888041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84462 + ... + 95778.

It is an arithmetic number, because the mean of its divisors is an integer number (47875140).

Almost surely, 2^1019888040 is an apocalyptic number.

1019888040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1019888040 is an abundant number, since it is smaller than the sum of its proper divisors (2044120920).

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

1019888040 is a wasteful number, since it uses less digits than its factorization.

1019888040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12082 (or 12078 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 1019888040 is about 31935.6859954503. The cubic root of 1019888040 is about 1006.5858776639.

The spelling of 1019888040 in words is "one billion, nineteen million, eight hundred eighty-eight thousand, forty".