40047980 has 48 divisors (see below), whose sum is σ = 98473536. Its totient is φ = 13393920.

The previous prime is 40047979. The next prime is 40047983. The reversal of 40047980 is 8974004.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40047983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2252 + ... + 9228.

It is an arithmetic number, because the mean of its divisors is an integer number (2051532).

Almost surely, 2^40047980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40047980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49236768).

40047980 is an abundant number, since it is smaller than the sum of its proper divisors (58425556).

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

40047980 is a wasteful number, since it uses less digits than its factorization.

40047980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034 (or 7032 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 40047980 is about 6328.3473356003. The cubic root of 40047980 is about 342.1318757746.

The spelling of 40047980 in words is "forty million, forty-seven thousand, nine hundred eighty".