1620442364 has 12 divisors (see below), whose sum is σ = 2840814984. Its totient is φ = 808780944.

The previous prime is 1620442333. The next prime is 1620442381. The reversal of 1620442364 is 4632440261.

It is a self number, because there is not a number n which added to its sum of digits gives 1620442364.

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, 357527 + ... + 362030.

It is an arithmetic number, because the mean of its divisors is an integer number (236734582).

Almost surely, 2^1620442364 is an apocalyptic number.

It is an amenable number.

1620442364 is a deficient number, since it is larger than the sum of its proper divisors (1220372620).

1620442364 is a wasteful number, since it uses less digits than its factorization.

1620442364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720124 (or 720122 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 1620442364 is about 40254.7185308754. The cubic root of 1620442364 is about 1174.5671836409.

The spelling of 1620442364 in words is "one billion, six hundred twenty million, four hundred forty-two thousand, three hundred sixty-four".