1645034340 has 48 divisors (see below), whose sum is σ = 4618313280. Its totient is φ = 437512320.

The previous prime is 1645034333. The next prime is 1645034387. The reversal of 1645034340 is 434305461.

It is a super-2 number, since 2×1645034340² = 5412275959558471200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1645034298 and 1645034307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13431 + ... + 58910.

It is an arithmetic number, because the mean of its divisors is an integer number (96214860).

Almost surely, 2^1645034340 is an apocalyptic number.

1645034340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1645034340 is an abundant number, since it is smaller than the sum of its proper divisors (2973278940).

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

1645034340 is a wasteful number, since it uses less digits than its factorization.

1645034340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72732 (or 72730 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 1645034340 is about 40559.0229172252. The cubic root of 1645034340 is about 1180.4791552098.

The spelling of 1645034340 in words is "one billion, six hundred forty-five million, thirty-four thousand, three hundred forty".