402423322222440 has 160 divisors (see below), whose sum is σ = 1352598826879080. Its totient is φ = 107312145919488.

The previous prime is 402423322222387. The next prime is 402423322222477. The reversal of 402423322222440 is 44222223324204.

402423322222440 is a `hidden beast` number, since 4 + 0 + 2 + 42 + 332 + 22 + 224 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 327483239864004 + 74940082358436 = 18096498^2 + 8656794^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 402423322222395 and 402423322222404.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 598924914 + ... + 599596446.

Almost surely, 2^{402423322222440} is an apocalyptic number.

402423322222440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402423322222440 is an abundant number, since it is smaller than the sum of its proper divisors (950175504656640).

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

402423322222440 is a wasteful number, since it uses less digits than its factorization.

402423322222440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856513 (or 856500 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 36.

Adding to 402423322222440 its reverse (44222223324204), we get a palindrome (446645545546644).

The spelling of 402423322222440 in words is "four hundred two trillion, four hundred twenty-three billion, three hundred twenty-two million, two hundred twenty-two thousand, four hundred forty".