405042590 has 16 divisors (see below), whose sum is σ = 752595840. Its totient is φ = 156790560.

The previous prime is 405042587. The next prime is 405042613. The reversal of 405042590 is 95240504.

It is a happy number.

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, 652985 + ... + 653604.

It is an arithmetic number, because the mean of its divisors is an integer number (47037240).

Almost surely, 2^405042590 is an apocalyptic number.

405042590 is a deficient number, since it is larger than the sum of its proper divisors (347553250).

405042590 is a wasteful number, since it uses less digits than its factorization.

405042590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306627.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 405042590 is about 20125.6699267378. The cubic root of 405042590 is about 739.8895561981.

The spelling of 405042590 in words is "four hundred five million, forty-two thousand, five hundred ninety".