402420202040 has 32 divisors (see below), whose sum is σ = 934653375360. Its totient is φ = 155775561600.

The previous prime is 402420201991. The next prime is 402420202061. The reversal of 402420202040 is 40202024204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162264971 + ... + 162267450.

It is an arithmetic number, because the mean of its divisors is an integer number (29207917980).

Almost surely, 2^402420202040 is an apocalyptic number.

402420202040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402420202040 is an abundant number, since it is smaller than the sum of its proper divisors (532233173320).

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

402420202040 is a wasteful number, since it uses less digits than its factorization.

402420202040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324532463 (or 324532459 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 402420202040 its reverse (40202024204), we get a palindrome (442622226244).

The spelling of 402420202040 in words is "four hundred two billion, four hundred twenty million, two hundred two thousand, forty".