402042040 has 48 divisors (see below), whose sum is σ = 916252200. Its totient is φ = 158770368.

The previous prime is 402042029. The next prime is 402042073. The reversal of 402042040 is 40240204.

402042040 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274831 + ... + 276289.

Almost surely, 2^402042040 is an apocalyptic number.

402042040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402042040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458126100).

402042040 is an abundant number, since it is smaller than the sum of its proper divisors (514210160).

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

402042040 is a wasteful number, since it uses less digits than its factorization.

402042040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636 (or 1549 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 402042040 is about 20050.9860106679. The cubic root of 402042040 is about 738.0579954081.

Adding to 402042040 its reverse (40240204), we get a palindrome (442282244).

The spelling of 402042040 in words is "four hundred two million, forty-two thousand, forty".