43961440 has 48 divisors (see below), whose sum is σ = 109332720. Its totient is φ = 16657920.

The previous prime is 43961429. The next prime is 43961443. The reversal of 43961440 is 4416934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43961443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4191 + ... + 10270.

It is an arithmetic number, because the mean of its divisors is an integer number (2277765).

Almost surely, 2^43961440 is an apocalyptic number.

43961440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43961440 is an abundant number, since it is smaller than the sum of its proper divisors (65371280).

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

43961440 is a wasteful number, since it uses less digits than its factorization.

43961440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14495 (or 14487 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 43961440 is about 6630.3423742670. The cubic root of 43961440 is about 352.9316744283.

The spelling of 43961440 in words is "forty-three million, nine hundred sixty-one thousand, four hundred forty".