405682990 has 16 divisors (see below), whose sum is σ = 741129552. Its totient is φ = 159850944.

The previous prime is 405682967. The next prime is 405683021. The reversal of 405682990 is 99286504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302079 + ... + 303418.

It is an arithmetic number, because the mean of its divisors is an integer number (46320597).

Almost surely, 2^405682990 is an apocalyptic number.

405682990 is a deficient number, since it is larger than the sum of its proper divisors (335446562).

405682990 is a wasteful number, since it uses less digits than its factorization.

405682990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605571.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 405682990 is about 20141.5736723822. The cubic root of 405682990 is about 740.2792895133.

The spelling of 405682990 in words is "four hundred five million, six hundred eighty-two thousand, nine hundred ninety".