400319990 has 32 divisors (see below), whose sum is σ = 824261184. Its totient is φ = 137128320.

The previous prime is 400319989. The next prime is 400319999. The reversal of 400319990 is 99913004.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 400319990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400319999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110000 + ... + 113580.

It is an arithmetic number, because the mean of its divisors is an integer number (25758162).

Almost surely, 2^400319990 is an apocalyptic number.

400319990 is an abundant number, since it is smaller than the sum of its proper divisors (423941194).

400319990 is a wasteful number, since it uses less digits than its factorization.

400319990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5192.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 400319990 is about 20007.9981507396. The cubic root of 400319990 is about 737.0027228994.

The spelling of 400319990 in words is "four hundred million, three hundred nineteen thousand, nine hundred ninety".