1900164 has 24 divisors (see below), whose sum is σ = 5067328. Its totient is φ = 542880.

The previous prime is 1900159. The next prime is 1900169. The reversal of 1900164 is 4610091.

It is an interprime number because it is at equal distance from previous prime (1900159) and next prime (1900169).

It is a super-2 number, since 2×1900164² = 7221246453792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 1900164.

It is not an unprimeable number, because it can be changed into a prime (1900169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11227 + ... + 11394.

2^1900164 is an apocalyptic number.

1900164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1900164 is an abundant number, since it is smaller than the sum of its proper divisors (3167164).

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

1900164 is a wasteful number, since it uses less digits than its factorization.

1900164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22635 (or 22633 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1900164 is about 1378.4643629779. The cubic root of 1900164 is about 123.8597964433.

The spelling of 1900164 in words is "one million, nine hundred thousand, one hundred sixty-four".