405890937 has 6 divisors (see below), whose sum is σ = 586286922. Its totient is φ = 270593952.

The previous prime is 405890899. The next prime is 405890941. The reversal of 405890937 is 739098504.

It can be written as a sum of positive squares in only one way, i.e., 267028281 + 138862656 = 16341^2 + 11784^2 .

It is not a de Polignac number, because 405890937 - 2¹² = 405886841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405890892 and 405890901.

It is not an unprimeable number, because it can be changed into a prime (405890987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22549488 + ... + 22549505.

It is an arithmetic number, because the mean of its divisors is an integer number (97714487).

Almost surely, 2^405890937 is an apocalyptic number.

It is an amenable number.

405890937 is a deficient number, since it is larger than the sum of its proper divisors (180395985).

405890937 is a wasteful number, since it uses less digits than its factorization.

405890937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45098999 (or 45098996 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 405890937 is about 20146.7351449311. The cubic root of 405890937 is about 740.4057532517.

The spelling of 405890937 in words is "four hundred five million, eight hundred ninety thousand, nine hundred thirty-seven".