1000043020 has 48 divisors (see below), whose sum is σ = 2226426048. Its totient is φ = 376012800.

The previous prime is 1000042991. The next prime is 1000043021. The reversal of 1000043020 is 203400001.

It is a Harshad number since it is a multiple of its sum of digits (10).

1000043020 is a modest number, since divided by 43020 gives 100 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1000042988 and 1000043006.

It is not an unprimeable number, because it can be changed into a prime (1000043021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390745 + ... + 393295.

It is an arithmetic number, because the mean of its divisors is an integer number (46383876).

Almost surely, 2^1000043020 is an apocalyptic number.

1000043020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000043020 is an abundant number, since it is smaller than the sum of its proper divisors (1226383028).

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

1000043020 is a wasteful number, since it uses less digits than its factorization.

1000043020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730 (or 3728 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 1000043020 is about 31623.4568002930. The cubic root of 1000043020 is about 1000.0143397944.

Adding to 1000043020 its reverse (203400001), we get a palindrome (1203443021).

The spelling of 1000043020 in words is "one billion, forty-three thousand, twenty".