2159405390 has 32 divisors (see below), whose sum is σ = 3981833856. Its totient is φ = 842718240.

The previous prime is 2159405387. The next prime is 2159405401. The reversal of 2159405390 is 935049512.

It is a super-2 number, since 2×2159405390² = 9326063276722104200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466829 + ... + 471431.

It is an arithmetic number, because the mean of its divisors is an integer number (124432308).

Almost surely, 2^2159405390 is an apocalyptic number.

2159405390 is a deficient number, since it is larger than the sum of its proper divisors (1822428466).

2159405390 is a wasteful number, since it uses less digits than its factorization.

2159405390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5744.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 2159405390 is about 46469.4027291077. The cubic root of 2159405390 is about 1292.5421875396.

The spelling of 2159405390 in words is "two billion, one hundred fifty-nine million, four hundred five thousand, three hundred ninety".