401900005439 has 16 divisors (see below), whose sum is σ = 409390800000. Its totient is φ = 394470984960.

The previous prime is 401900005427. The next prime is 401900005499. The reversal of 401900005439 is 934500009104.

It is a cyclic number.

It is not a de Polignac number, because 401900005439 - 2¹² = 401900001343 is a prime.

It is a super-2 number, since 2×401900005439² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401900005399 and 401900005408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401900005499) 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, 69904937 + ... + 69910685.

It is an arithmetic number, because the mean of its divisors is an integer number (25586925000).

Almost surely, 2^401900005439 is an apocalyptic number.

401900005439 is a deficient number, since it is larger than the sum of its proper divisors (7490794561).

401900005439 is a wasteful number, since it uses less digits than its factorization.

401900005439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10898.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 401900005439 in words is "four hundred one billion, nine hundred million, five thousand, four hundred thirty-nine".