400071790 has 16 divisors (see below), whose sum is σ = 758031120. Its totient is φ = 151606080.

The previous prime is 400071781. The next prime is 400071851. The reversal of 400071790 is 97170004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1052631 + ... + 1053010.

It is an arithmetic number, because the mean of its divisors is an integer number (47376945).

Almost surely, 2^400071790 is an apocalyptic number.

400071790 is a deficient number, since it is larger than the sum of its proper divisors (357959330).

400071790 is a wasteful number, since it uses less digits than its factorization.

400071790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105667.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 400071790 is about 20001.7946694790. The cubic root of 400071790 is about 736.8503765282.

The spelling of 400071790 in words is "four hundred million, seventy-one thousand, seven hundred ninety".