43978680 has 128 divisors (see below), whose sum is σ = 150163200. Its totient is φ = 11442816.

The previous prime is 43978679. The next prime is 43978687. The reversal of 43978680 is 8687934.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43978687) 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, 45967 + ... + 46913.

It is an arithmetic number, because the mean of its divisors is an integer number (1173150).

Almost surely, 2^43978680 is an apocalyptic number.

43978680 is a gapful number since it is divisible by the number (40) 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 43978680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75081600).

43978680 is an abundant number, since it is smaller than the sum of its proper divisors (106184520).

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

43978680 is a wasteful number, since it uses less digits than its factorization.

43978680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 43978680 is about 6631.6423305242. The cubic root of 43978680 is about 352.9778038458.

The spelling of 43978680 in words is "forty-three million, nine hundred seventy-eight thousand, six hundred eighty".