1890172 has 6 divisors (see below), whose sum is σ = 3307808. Its totient is φ = 945084.

The previous prime is 1890167. The next prime is 1890173. The reversal of 1890172 is 2710981.

It is a self number, because there is not a number n which added to its sum of digits gives 1890172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236268 + ... + 236275.

2^1890172 is an apocalyptic number.

It is an amenable number.

1890172 is a deficient number, since it is larger than the sum of its proper divisors (1417636).

1890172 is a wasteful number, since it uses less digits than its factorization.

1890172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472547 (or 472545 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1890172 is about 1374.8352628588. The cubic root of 1890172 is about 123.6423094682.

The spelling of 1890172 in words is "one million, eight hundred ninety thousand, one hundred seventy-two".