402140321040 has 40 divisors (see below), whose sum is σ = 1246634995968. Its totient is φ = 107237418880.

The previous prime is 402140320991. The next prime is 402140321057. The reversal of 402140321040 is 40123041204.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 402140320998 and 402140321016.

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, 837792096 + ... + 837792575.

Almost surely, 2^402140321040 is an apocalyptic number.

402140321040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402140321040 is an abundant number, since it is smaller than the sum of its proper divisors (844494674928).

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

402140321040 is a wasteful number, since it uses less digits than its factorization.

402140321040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675584687 (or 1675584681 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 402140321040 its reverse (40123041204), we get a palindrome (442263362244).

The spelling of 402140321040 in words is "four hundred two billion, one hundred forty million, three hundred twenty-one thousand, forty".