402045040 has 40 divisors (see below), whose sum is σ = 945274320. Its totient is φ = 159008256.

The previous prime is 402045013. The next prime is 402045041. The reversal of 402045040 is 40540204.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 402044999 and 402045017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402045041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21114 + ... + 35353.

It is an arithmetic number, because the mean of its divisors is an integer number (23631858).

Almost surely, 2^402045040 is an apocalyptic number.

402045040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402045040 is an abundant number, since it is smaller than the sum of its proper divisors (543229280).

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

402045040 is a wasteful number, since it uses less digits than its factorization.

402045040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56569 (or 56563 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 402045040 is about 20051.0608198170. The cubic root of 402045040 is about 738.0598311767.

Adding to 402045040 its reverse (40540204), we get a palindrome (442585244).

The spelling of 402045040 in words is "four hundred two million, forty-five thousand, forty".