43974645 has 96 divisors (see below), whose sum is σ = 88542720. Its totient is φ = 18420480.

The previous prime is 43974613. The next prime is 43974661. The reversal of 43974645 is 54647934.

It is not a de Polignac number, because 43974645 - 2⁵ = 43974613 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43974597 and 43974606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 529774 + ... + 529856.

It is an arithmetic number, because the mean of its divisors is an integer number (922320).

Almost surely, 2^43974645 is an apocalyptic number.

It is an amenable number.

43974645 is an abundant number, since it is smaller than the sum of its proper divisors (44568075).

43974645 is a wasteful number, since it uses less digits than its factorization.

43974645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 134 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 43974645 is about 6631.3381002630. The cubic root of 43974645 is about 352.9670083953.

Subtracting 43974645 from its reverse (54647934), we obtain a square (10673289 = 3267²).

The spelling of 43974645 in words is "forty-three million, nine hundred seventy-four thousand, six hundred forty-five".