40402430421 has 8 divisors (see below), whose sum is σ = 54008391840. Its totient is φ = 26865711312.

The previous prime is 40402430377. The next prime is 40402430447. The reversal of 40402430421 is 12403420404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40402430421 - 2¹⁸ = 40402168277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40402430391 and 40402430400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402430491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17309215 + ... + 17311548.

It is an arithmetic number, because the mean of its divisors is an integer number (6751048980).

Almost surely, 2^40402430421 is an apocalyptic number.

It is an amenable number.

40402430421 is a deficient number, since it is larger than the sum of its proper divisors (13605961419).

40402430421 is a wasteful number, since it uses less digits than its factorization.

40402430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34621155.

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

Adding to 40402430421 its reverse (12403420404), we get a palindrome (52805850825).

The spelling of 40402430421 in words is "forty billion, four hundred two million, four hundred thirty thousand, four hundred twenty-one".