1645032048 has 40 divisors (see below), whose sum is σ = 4636000896. Its totient is φ = 498494400.

The previous prime is 1645032043. The next prime is 1645032049. The reversal of 1645032048 is 8402305461.

It is a super-2 number, since 2×1645032048² = 5412260877894148608, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645032043) 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, 1557268 + ... + 1558323.

Almost surely, 2^1645032048 is an apocalyptic number.

It is an amenable number.

1645032048 is an abundant number, since it is smaller than the sum of its proper divisors (2990968848).

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

1645032048 is a wasteful number, since it uses less digits than its factorization.

1645032048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115613 (or 3115607 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1645032048 is about 40558.9946620968. The cubic root of 1645032048 is about 1180.4786069620.

The spelling of 1645032048 in words is "one billion, six hundred forty-five million, thirty-two thousand, forty-eight".