1967990 has 8 divisors (see below), whose sum is σ = 3542400. Its totient is φ = 787192.

The previous prime is 1967947. The next prime is 1968017. The reversal of 1967990 is 997691.

It is a happy number.

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

It is a congruent number.

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, 98390 + ... + 98409.

It is an arithmetic number, because the mean of its divisors is an integer number (442800).

2^1967990 is an apocalyptic number.

1967990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1967990 is a deficient number, since it is larger than the sum of its proper divisors (1574410).

1967990 is a wasteful number, since it uses less digits than its factorization.

1967990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196806.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 1967990 is about 1402.8506691733. The cubic root of 1967990 is about 125.3163188638.

Subtracting from 1967990 its reverse (997691), we obtain a cube (970299 = 99³).

The spelling of 1967990 in words is "one million, nine hundred sixty-seven thousand, nine hundred ninety".