3545640 has 192 divisors, whose sum is σ = 13953600. Its totient is φ = 798336.

The previous prime is 3545629. The next prime is 3545693. The reversal of 3545640 is 465453.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52887 + ... + 52953.

It is an arithmetic number, because the mean of its divisors is an integer number (72675).

Almost surely, 2^3545640 is an apocalyptic number.

3545640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3545640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6976800).

3545640 is an abundant number, since it is smaller than the sum of its proper divisors (10407960).

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

3545640 is a wasteful number, since it uses less digits than its factorization.

3545640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 3545640 is about 1882.9869888026. The cubic root of 3545640 is about 152.4865526080.

The spelling of 3545640 in words is "three million, five hundred forty-five thousand, six hundred forty".