1001404840 has 16 divisors (see below), whose sum is σ = 2253160980. Its totient is φ = 400561920.

The previous prime is 1001404837. The next prime is 1001404879. The reversal of 1001404840 is 484041001.

1001404840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 850655556 + 150749284 = 29166^2 + 12278^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12517521 + ... + 12517600.

Almost surely, 2^1001404840 is an apocalyptic number.

1001404840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001404840 is an abundant number, since it is smaller than the sum of its proper divisors (1251756140).

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

1001404840 is a wasteful number, since it uses less digits than its factorization.

1001404840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25035132 (or 25035128 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 1001404840 is about 31644.9812766574. The cubic root of 1001404840 is about 1000.4680608848.

Adding to 1001404840 its reverse (484041001), we get a palindrome (1485445841).

The spelling of 1001404840 in words is "one billion, one million, four hundred four thousand, eight hundred forty".