1972990 has 8 divisors (see below), whose sum is σ = 3551400. Its totient is φ = 789192.

The previous prime is 1972987. The next prime is 1973011. The reversal of 1972990 is 992791.

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, 98640 + ... + 98659.

It is an arithmetic number, because the mean of its divisors is an integer number (443925).

2^1972990 is an apocalyptic number.

1972990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1972990 is a deficient number, since it is larger than the sum of its proper divisors (1578410).

1972990 is a wasteful number, since it uses less digits than its factorization.

1972990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197306.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 1972990 is about 1404.6316243058. The cubic root of 1972990 is about 125.4223579693.

The spelling of 1972990 in words is "one million, nine hundred seventy-two thousand, nine hundred ninety".