8401890 has 32 divisors (see below), whose sum is σ = 23045760. Its totient is φ = 1920384.

The previous prime is 8401873. The next prime is 8401901. The reversal of 8401890 is 981048.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

8401890 is a modest number, since divided by 1890 gives 840 as remainder.

It is a Curzon 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, 19795 + ... + 20214.

It is an arithmetic number, because the mean of its divisors is an integer number (720180).

Almost surely, 2^8401890 is an apocalyptic number.

8401890 is an abundant number, since it is smaller than the sum of its proper divisors (14643870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8401890 is a wasteful number, since it uses less digits than its factorization.

8401890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40026.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 8401890 is about 2898.6013868761. The cubic root of 8401890 is about 203.2945161650.

It can be divided in two parts, 840 and 1890, that multiplied together give a square (1587600 = 1260²).

The spelling of 8401890 in words is "eight million, four hundred one thousand, eight hundred ninety".