1620400214 has 4 divisors (see below), whose sum is σ = 2430600324. Its totient is φ = 810200106.

The previous prime is 1620400183. The next prime is 1620400241. The reversal of 1620400214 is 4120040261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4120040261 = 2531 ⋅1627831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405100052 + ... + 405100055.

It is an arithmetic number, because the mean of its divisors is an integer number (607650081).

Almost surely, 2^1620400214 is an apocalyptic number.

1620400214 is a deficient number, since it is larger than the sum of its proper divisors (810200110).

1620400214 is an equidigital number, since it uses as much as digits as its factorization.

1620400214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810200109.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1620400214 is about 40254.1949863614. The cubic root of 1620400214 is about 1174.5569995009.

Adding to 1620400214 its reverse (4120040261), we get a palindrome (5740440475).

The spelling of 1620400214 in words is "one billion, six hundred twenty million, four hundred thousand, two hundred fourteen".