402003040 has 48 divisors (see below), whose sum is σ = 980380800. Its totient is φ = 155612160.

The previous prime is 402003031. The next prime is 402003047. The reversal of 402003040 is 40300204.

It is a self number, because there is not a number n which added to its sum of digits gives 402003040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402003047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35565 + ... + 45484.

It is an arithmetic number, because the mean of its divisors is an integer number (20424600).

Almost surely, 2^402003040 is an apocalyptic number.

402003040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402003040 is an abundant number, since it is smaller than the sum of its proper divisors (578377760).

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

402003040 is a wasteful number, since it uses less digits than its factorization.

402003040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81095 (or 81087 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 402003040 is about 20050.0134663296. The cubic root of 402003040 is about 738.0341295850.

Adding to 402003040 its reverse (40300204), we get a palindrome (442303244).

The spelling of 402003040 in words is "four hundred two million, three thousand, forty".