4000398490 has 16 divisors (see below), whose sum is σ = 7855328160. Its totient is φ = 1454690320.

The previous prime is 4000398473. The next prime is 4000398497. The reversal of 4000398490 is 948930004.

It is not an unprimeable number, because it can be changed into a prime (4000398497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18183520 + ... + 18183739.

It is an arithmetic number, because the mean of its divisors is an integer number (490958010).

Almost surely, 2^4000398490 is an apocalyptic number.

4000398490 is a deficient number, since it is larger than the sum of its proper divisors (3854929670).

4000398490 is a wasteful number, since it uses less digits than its factorization.

4000398490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36367277.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 4000398490 is about 63248.7034649723. The cubic root of 4000398490 is about 1587.4537638382.

The spelling of 4000398490 in words is "four billion, three hundred ninety-eight thousand, four hundred ninety".