402424044440 has 64 divisors (see below), whose sum is σ = 987883132320. Its totient is φ = 146318976000.

The previous prime is 402424044431. The next prime is 402424044443. The reversal of 402424044440 is 44440424204.

It is a super-2 number, since 2×402424044440² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402424044397 and 402424044406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402424044443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4096700 + ... + 4193780.

Almost surely, 2^402424044440 is an apocalyptic number.

402424044440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402424044440 is an abundant number, since it is smaller than the sum of its proper divisors (585459087880).

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

402424044440 is a wasteful number, since it uses less digits than its factorization.

402424044440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106524 (or 106520 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 402424044440 its reverse (44440424204), we get a palindrome (446864468644).

The spelling of 402424044440 in words is "four hundred two billion, four hundred twenty-four million, forty-four thousand, four hundred forty".