402420989687 has 16 divisors (see below), whose sum is σ = 420912350208. Its totient is φ = 384013132800.

The previous prime is 402420989599. The next prime is 402420989689. The reversal of 402420989687 is 786989024204.

It is a cyclic number.

It is not a de Polignac number, because 402420989687 - 2¹⁰ = 402420988663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402420989689) 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, 41909687 + ... + 41919287.

It is an arithmetic number, because the mean of its divisors is an integer number (26307021888).

Almost surely, 2^402420989687 is an apocalyptic number.

402420989687 is a deficient number, since it is larger than the sum of its proper divisors (18491360521).

402420989687 is a wasteful number, since it uses less digits than its factorization.

402420989687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13750.

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 402420989687 in words is "four hundred two billion, four hundred twenty million, nine hundred eighty-nine thousand, six hundred eighty-seven".