1972390 has 32 divisors (see below), whose sum is σ = 4273920. Its totient is φ = 640224.

The previous prime is 1972381. The next prime is 1972417. The reversal of 1972390 is 932791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (133560).

2^1972390 is an apocalyptic number.

1972390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1972390 is an abundant number, since it is smaller than the sum of its proper divisors (2301530).

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

1972390 is a wasteful number, since it uses less digits than its factorization.

1972390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 1972390 is about 1404.4180289358. The cubic root of 1972390 is about 125.4096427428.

The spelling of 1972390 in words is "one million, nine hundred seventy-two thousand, three hundred ninety".