10203890 has 8 divisors (see below), whose sum is σ = 18367020. Its totient is φ = 4081552.

The previous prime is 10203889. The next prime is 10203979. The reversal of 10203890 is 9830201.

It can be written as a sum of positive squares in 2 ways, for example, as 9284209 + 919681 = 3047^2 + 959^2 .

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

It is a super-2 number, since 2×10203890² = 208238742264200, which contains 22 as substring.

It is a Curzon number.

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, 510185 + ... + 510204.

Almost surely, 2^10203890 is an apocalyptic number.

10203890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10203890 is a deficient number, since it is larger than the sum of its proper divisors (8163130).

10203890 is a wasteful number, since it uses less digits than its factorization.

10203890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020396.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 10203890 is about 3194.3528296041. The cubic root of 10203890 is about 216.8978544793.

The spelling of 10203890 in words is "ten million, two hundred three thousand, eight hundred ninety".