1970890 has 8 divisors (see below), whose sum is σ = 3547620. Its totient is φ = 788352.

The previous prime is 1970873. The next prime is 1970921. The reversal of 1970890 is 980791.

It can be written as a sum of positive squares in 2 ways, for example, as 1957201 + 13689 = 1399^2 + 117^2 .

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

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, 98535 + ... + 98554.

2^1970890 is an apocalyptic number.

1970890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1970890 is a deficient number, since it is larger than the sum of its proper divisors (1576730).

1970890 is a wasteful number, since it uses less digits than its factorization.

1970890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197096.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1970890 is about 1403.8838983335. The cubic root of 1970890 is about 125.3778433909.

Subtracting from 1970890 its reverse (980791), we obtain a palindrome (990099).

The spelling of 1970890 in words is "one million, nine hundred seventy thousand, eight hundred ninety".