43902945 has 32 divisors (see below), whose sum is σ = 78374400. Its totient is φ = 23317632.

The previous prime is 43902941. The next prime is 43902961. The reversal of 43902945 is 54920934.

It is not a de Polignac number, because 43902945 - 2² = 43902941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43902941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41736 + ... + 42774.

It is an arithmetic number, because the mean of its divisors is an integer number (2449200).

Almost surely, 2^43902945 is an apocalyptic number.

43902945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43902945 is a deficient number, since it is larger than the sum of its proper divisors (34471455).

43902945 is a wasteful number, since it uses less digits than its factorization.

43902945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 43902945 is about 6625.9297460809. The cubic root of 43902945 is about 352.7750682321.

The spelling of 43902945 in words is "forty-three million, nine hundred two thousand, nine hundred forty-five".