4990405 has 12 divisors (see below), whose sum is σ = 6966540. Its totient is φ = 3421824.

The previous prime is 4990393. The next prime is 4990409. The reversal of 4990405 is 5040994.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2683044 + 2307361 = 1638^2 + 1519^2 .

It is not a de Polignac number, because 4990405 - 2⁷ = 4990277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4990409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9940 + ... + 10429.

It is an arithmetic number, because the mean of its divisors is an integer number (580545).

Almost surely, 2^4990405 is an apocalyptic number.

It is an amenable number.

4990405 is a deficient number, since it is larger than the sum of its proper divisors (1976135).

4990405 is a wasteful number, since it uses less digits than its factorization.

4990405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20388 (or 20381 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 4990405 is about 2233.9214399795. The cubic root of 4990405 is about 170.8881431639. Note that the first 3 decimals are identical.

The spelling of 4990405 in words is "four million, nine hundred ninety thousand, four hundred five".