820642614 has 32 divisors (see below), whose sum is σ = 1792955520. Its totient is φ = 248337600.

The previous prime is 820642591. The next prime is 820642727. The reversal of 820642614 is 416246028.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 in 15 ways as a sum of consecutive naturals, for example, 42057 + ... + 58395.

It is an arithmetic number, because the mean of its divisors is an integer number (56029860).

Almost surely, 2^820642614 is an apocalyptic number.

820642614 is an abundant number, since it is smaller than the sum of its proper divisors (972312906).

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

820642614 is a wasteful number, since it uses less digits than its factorization.

820642614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17116.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 820642614 is about 28646.8604562524. The cubic root of 820642614 is about 936.2346026916.

The spelling of 820642614 in words is "eight hundred twenty million, six hundred forty-two thousand, six hundred fourteen".