402420100004391 has 32 divisors (see below), whose sum is σ = 661229432640000. Its totient is φ = 212538031902720.

The previous prime is 402420100004371. The next prime is 402420100004509. The reversal of 402420100004391 is 193400001024204.

It is not a de Polignac number, because 402420100004391 - 2¹¹ = 402420100002343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402420100004371) 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, 12299638266 + ... + 12299670983.

It is an arithmetic number, because the mean of its divisors is an integer number (20663419770000).

Almost surely, 2^{402420100004391} is an apocalyptic number.

402420100004391 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

402420100004391 is a deficient number, since it is larger than the sum of its proper divisors (258809332635609).

402420100004391 is a wasteful number, since it uses less digits than its factorization.

402420100004391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24599309319.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 402420100004391 its reverse (193400001024204), we get a palindrome (595820101028595).

The spelling of 402420100004391 in words is "four hundred two trillion, four hundred twenty billion, one hundred million, four thousand, three hundred ninety-one".