1002400544 has 24 divisors (see below), whose sum is σ = 2041528860. Its totient is φ = 483917056.

The previous prime is 1002400543. The next prime is 1002400547. The reversal of 1002400544 is 4450042001.

It can be written as a sum of positive squares in 2 ways, for example, as 1002355600 + 44944 = 31660^2 + 212^2 .

It is a super-2 number, since 2×1002400544² = 2009613701222991872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1002400541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539159 + ... + 541014.

Almost surely, 2^1002400544 is an apocalyptic number.

It is an amenable number.

1002400544 is an abundant number, since it is smaller than the sum of its proper divisors (1039128316).

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

1002400544 is a wasteful number, since it uses less digits than its factorization.

1002400544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080212 (or 1080204 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1002400544 is about 31660.7097835788. The cubic root of 1002400544 is about 1000.7995418957.

Adding to 1002400544 its reverse (4450042001), we get a palindrome (5452442545).

The spelling of 1002400544 in words is "one billion, two million, four hundred thousand, five hundred forty-four".