1622451852 has 72 divisors (see below), whose sum is σ = 4692187136. Its totient is φ = 463053024.

The previous prime is 1622451851. The next prime is 1622451869. The reversal of 1622451852 is 2581542261.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1622451851) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 270963 + ... + 276885.

Almost surely, 2^1622451852 is an apocalyptic number.

1622451852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1622451852 is an abundant number, since it is smaller than the sum of its proper divisors (3069735284).

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

1622451852 is a wasteful number, since it uses less digits than its factorization.

1622451852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7027 (or 7022 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 1622451852 is about 40279.6704554543. The cubic root of 1622451852 is about 1175.0525045498.

The spelling of 1622451852 in words is "one billion, six hundred twenty-two million, four hundred fifty-one thousand, eight hundred fifty-two".