43722738 has 12 divisors (see below), whose sum is σ = 94732638. Its totient is φ = 14574240.

The previous prime is 43722733. The next prime is 43722739. The reversal of 43722738 is 83722734.

It can be written as a sum of positive squares in only one way, i.e., 31169889 + 12552849 = 5583^2 + 3543^2 .

It is not an unprimeable number, because it can be changed into a prime (43722733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1214503 + ... + 1214538.

Almost surely, 2^43722738 is an apocalyptic number.

43722738 is an abundant number, since it is smaller than the sum of its proper divisors (51009900).

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

43722738 is a wasteful number, since it uses less digits than its factorization.

43722738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429049 (or 2429046 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 43722738 is about 6612.3171430294. The cubic root of 43722738 is about 352.2917315069.

It can be divided in two parts, 4372273 and 8, that added together give a square (4372281 = 2091²).

The spelling of 43722738 in words is "forty-three million, seven hundred twenty-two thousand, seven hundred thirty-eight".