400271890 has 8 divisors (see below), whose sum is σ = 720489420. Its totient is φ = 160108752.

The previous prime is 400271887. The next prime is 400271903. The reversal of 400271890 is 98172004.

It can be written as a sum of positive squares in 2 ways, for example, as 378341401 + 21930489 = 19451^2 + 4683^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20013585 + ... + 20013604.

Almost surely, 2^400271890 is an apocalyptic number.

400271890 is a deficient number, since it is larger than the sum of its proper divisors (320217530).

400271890 is a wasteful number, since it uses less digits than its factorization.

400271890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40027196.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 400271890 is about 20006.7960953272. The cubic root of 400271890 is about 736.9732038049.

The spelling of 400271890 in words is "four hundred million, two hundred seventy-one thousand, eight hundred ninety".