163490404 has 48 divisors (see below), whose sum is σ = 368234496. Its totient is φ = 61639200.

The previous prime is 163490401. The next prime is 163490441. The reversal of 163490404 is 404094361.

It is a super-2 number, since 2×163490404² = 53458224400166432, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (163490401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 987 + ... + 18109.

It is an arithmetic number, because the mean of its divisors is an integer number (7671552).

Almost surely, 2^163490404 is an apocalyptic number.

163490404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163490404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184117248).

163490404 is an abundant number, since it is smaller than the sum of its proper divisors (204744092).

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

163490404 is a wasteful number, since it uses less digits than its factorization.

163490404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17176 (or 17174 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 163490404 is about 12786.3366137452. The cubic root of 163490404 is about 546.8028325951.

The spelling of 163490404 in words is "one hundred sixty-three million, four hundred ninety thousand, four hundred four".