402424310040 has 128 divisors (see below), whose sum is σ = 1218421785600. Its totient is φ = 106322872320.

The previous prime is 402424310021. The next prime is 402424310047. The reversal of 402424310040 is 40013424204.

It is a happy number.

It is a super-2 number, since 2×402424310040² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402424310047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55741551 + ... + 55748769.

It is an arithmetic number, because the mean of its divisors is an integer number (9518920200).

Almost surely, 2^402424310040 is an apocalyptic number.

402424310040 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 402424310040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (609210892800).

402424310040 is an abundant number, since it is smaller than the sum of its proper divisors (815997475560).

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

402424310040 is a wasteful number, since it uses less digits than its factorization.

402424310040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11457 (or 11453 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 402424310040 its reverse (40013424204), we get a palindrome (442437734244).

The spelling of 402424310040 in words is "four hundred two billion, four hundred twenty-four million, three hundred ten thousand, forty".