1620190 has 48 divisors (see below), whose sum is σ = 3485664. Its totient is φ = 538560.

The previous prime is 1620161. The next prime is 1620209. The reversal of 1620190 is 910261.

It is a super-2 number, since 2×1620190² = 5250031272200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (19) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15679 + ... + 15781.

It is an arithmetic number, because the mean of its divisors is an integer number (72618).

2^1620190 is an apocalyptic number.

1620190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620190 is an abundant number, since it is smaller than the sum of its proper divisors (1865474).

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

1620190 is a wasteful number, since it uses less digits than its factorization.

1620190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1620190 is about 1272.8668429965. The cubic root of 1620190 is about 117.4506205670.

The spelling of 1620190 in words is "one million, six hundred twenty thousand, one hundred ninety".