1645442360 has 32 divisors (see below), whose sum is σ = 3705512400. Its totient is φ = 657596160.

The previous prime is 1645442311. The next prime is 1645442369. The reversal of 1645442360 is 632445461.

It is a self number, because there is not a number n which added to its sum of digits gives 1645442360.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645442369) 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, 29276 + ... + 64404.

Almost surely, 2^1645442360 is an apocalyptic number.

1645442360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1645442360 is the 23420-th octagonal number.

It is an amenable number.

1645442360 is an abundant number, since it is smaller than the sum of its proper divisors (2060070040).

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

1645442360 is a wasteful number, since it uses less digits than its factorization.

1645442360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36311 (or 36307 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 1645442360 is about 40564.0525588852. The cubic root of 1645442360 is about 1180.5767457335.

The spelling of 1645442360 in words is "one billion, six hundred forty-five million, four hundred forty-two thousand, three hundred sixty".