10161990 has 64 divisors (see below), whose sum is σ = 27587520. Its totient is φ = 2661120.

The previous prime is 10161959. The next prime is 10161997. The reversal of 10161990 is 9916101.

10161990 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10161997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16162 + ... + 16778.

It is an arithmetic number, because the mean of its divisors is an integer number (431055).

Almost surely, 2^10161990 is an apocalyptic number.

10161990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10161990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13793760).

10161990 is an abundant number, since it is smaller than the sum of its proper divisors (17425530).

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

10161990 is a wasteful number, since it uses less digits than its factorization.

10161990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 10161990 is about 3187.7876340810. The cubic root of 10161990 is about 216.6005662925.

The spelling of 10161990 in words is "ten million, one hundred sixty-one thousand, nine hundred ninety".