1645422072 has 32 divisors (see below), whose sum is σ = 4701206400. Its totient is φ = 470120544.

The previous prime is 1645422071. The next prime is 1645422073. The reversal of 1645422072 is 2702245461.

It is an interprime number because it is at equal distance from previous prime (1645422071) and next prime (1645422073).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645422071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4896922 + ... + 4897257.

It is an arithmetic number, because the mean of its divisors is an integer number (146912700).

Almost surely, 2^1645422072 is an apocalyptic number.

1645422072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1645422072 is an abundant number, since it is smaller than the sum of its proper divisors (3055784328).

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

1645422072 is a wasteful number, since it uses less digits than its factorization.

1645422072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9794195 (or 9794191 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 1645422072 is about 40563.8024844812. The cubic root of 1645422072 is about 1180.5718936159.

The spelling of 1645422072 in words is "one billion, six hundred forty-five million, four hundred twenty-two thousand, seventy-two".